View source for Suffolk County, New York

{{Short description|County in New York, United States}}
{{Other uses|Suffolk (disambiguation)#Places}}
{{Use American English|date=June 2025}}
{{Use mdy dates|date=August 2025}}
{{Infobox U.S. county
 | county               = Suffolk County
 | flag                 = Suffolk County New York Flag.png
 | state                = New York
 | type                 = [[List of counties in New York|County]]
 | seal                 = Suffolk County New York Seal.png
 | founded date         =
 | founded year         = 1683
 | ex image             = Montauk 01.jpg
 | ex image size        = 300
 | ex image cap         = Dawn over [[Montauk Point Light]]
 | leader_title         = Executive
 | leader_name          = Edward P. Romaine ([[Republican Party (United States)|R]])
 | named for            = [[Suffolk]], England
 | seat                 = [[Riverhead (town), New York|Riverhead]]
 | largest city         = [[Brookhaven, New York|Brookhaven]]
 | coordinates          = {{Coord|40.94|-72.68|type:adm2nd_region:US-NY_source:UScensus1990|display=title,inline}}
 | city type            = town
 | area_total_sq_mi     = 2373
 | area_land_sq_mi      = 912
 | area_water_sq_mi     = 1461
 | area percentage      = 62
 | census yr            = 2020
 | pop                  = 1,525,920
 | pop_est_as_of        = 2024
 | population_est       =     1,535,909 {{gain}}
 | density_sq_mi        = 1,673.16
 | web                  = www.suffolkcountyny.gov
 | footnotes            =<ref name=QuickFactsSuffolkCountyLI/>
 | time zone            = Eastern
 | district             = 1st
 | district2            = 2nd
 | district3            = 3rd
 | seal size            = 80px}}
{{maplink|frame=yes|type=shape|stroke-width=3|text=Interactive map of Suffolk County, New York}}
{{Long Island}}
'''Suffolk County''' ({{IPAc-en|ˈ|s|ʌ|f|ə|k}} {{respell|SUF|ək}}) is the easternmost [[List of counties in New York|county]] in the U.S. state of New York, constituting the eastern two-thirds of [[Long Island]]. It is bordered to its west by [[Nassau County, New York|Nassau County]], to its east by [[Gardiners Bay]] and the open [[Atlantic Ocean]], to its north by [[Long Island Sound]], and to its south by the Atlantic Ocean.

As of the [[2020 United States census]], the county's population was 1,525,920,<ref name=QuickFactsSuffolkCountyLI>{{cite web|title=State & County QuickFacts - Suffolk County, New York|url=https://www.census.gov/quickfacts/fact/table/suffolkcountynewyork,US/PST045216|publisher=United States Census Bureau|access-date=June 27, 2025}}</ref> its highest [[United States census|decennial count]] ever, making Suffolk the fourth-most populous county in the State of New York, and the most populous outside of the [[borough (New York City)|boroughs]] of New York City. Its [[county seat]] is [[Riverhead (town), New York|Riverhead]],<ref name="GR6">{{cite web|url=https://www.naco.org/Counties/Pages/FindACounty.aspx|access-date=June 7, 2011|title=Find a County|publisher=National Association of Counties}}</ref> though most county offices are in [[Hauppauge]].<ref>{{cite web|url=http://www.suffolkcountyny.gov/|title=Suffolk County Government|publisher=Suffolk County, New York|access-date=April 22, 2015}}</ref> The county was named after the county of [[Suffolk]] in England, the origin of its earliest European settlers.

Suffolk County incorporates the easternmost extreme of both the [[New York City metropolitan area]] and New York State. The geographically largest of [[Long Island]]'s four counties and the second-largest of New York's 62 counties, Suffolk County is {{convert|86|mi|km}} in length and {{convert|26|mi|km}} in width at its widest (including water).<ref>[http://www.co.suffolk.ny.us/ About Suffolk County on the county website] {{Webarchive|url=https://web.archive.org/web/20080522093922/http://www.co.suffolk.ny.us/ |date=May 22, 2008 }}<!---http://www.britannica.com/EBchecked/topic/347278/Long-Island has entire island just 23 miles at its widest – and that would seem to be near the Nassau -Suffolk line---></ref> Most of the island is near sea level, with over {{convert|1000|mi|km|-2|abbr=off|sp=us}} of coastline.<ref name=":0" />

Like other [[Economy of Long Island|parts of Long Island]], the county's high population density and proximity to New York City has resulted in a diverse economy, including industry, science, agriculture, fishery, and tourism. Major [[scientific research]] facilities in Suffolk County include [[Brookhaven National Laboratory]] in [[Upton, New York|Upton]] and [[Plum Island Animal Disease Center]] on [[Plum Island (New York)|Plum Island]]. The county is home to [[Stony Brook University]] in [[Stony Brook, New York|Stony Brook]] and [[Farmingdale State College]] in [[East Farmingdale]].

==History==
Suffolk County was part of the [[Connecticut Colony]] before becoming an [[Province of New York#The twelve original counties|original county of the Province of New York]], one of twelve created in 1683. From 1664 until 1683, it had been the East Riding of [[York Shire (Province of New York)|Yorkshire]]. Its boundaries were essentially the same as at present, with only minor changes in the boundary with its western neighbor, which was originally [[Queens County, New York|Queens County]] but has been [[Nassau County, New York|Nassau County]] since the separation of Nassau from Queens in 1899.

During the [[American Revolutionary War]], [[Kingdom of Great Britain|Great Britain]] occupied Suffolk County after the retreat of [[Continental Army|George Washington's forces]] in the [[Battle of Long Island]],<ref>{{Cite web |date=November 2, 2014 |title=Suffolk Closeup: Long Island's role in American Revolution |url=https://suffolktimes.timesreview.com/2014/11/suffolk-closeup-long-islands-role-in-american-revolution/ |access-date=March 26, 2024 |website=The Suffolk Times |language=en-US}}</ref> and the county remained under occupation until the British evacuation of New York on November 25, 1783.<ref>{{Cite web |last=Steenshorne |first=Jennifer E. |year=2010 |title=New York Archives - The British Ditch New York City |url=https://www.nysarchivestrust.org/application/files/5015/6347/3099/archivesmag_fall10.pdf }}</ref>

According to the Suffolk County website, the county is the leading agricultural county in the state of New York, saying that: "The weather is temperate, clean water is abundant, and the soil is so good that Suffolk is the leading agricultural county in New York State. That Suffolk is still number one in farming, even with the development that has taken place, is a tribute to thoughtful planning, along with the excellent soil, favorable weather conditions, and the work of the dedicated farmers in this region."<ref>http://www.co.suffolk.ny.us/ {{Webarchive|url=https://web.archive.org/web/20080522093922/http://www.co.suffolk.ny.us/ |date=May 22, 2008 }} "About Suffolk County"</ref>

==Geography==
According to the [[U.S. Census Bureau]], the county has an area of {{convert|2373|sqmi}}, of which {{convert|912|sqmi}} is land and {{convert|1461|sqmi}} (62%) is water.<ref name="GR1">{{cite web|url=https://www.census.gov/geo/maps-data/data/docs/gazetteer/counties_list_36.txt|publisher=United States Census Bureau|access-date=January 7, 2015|date=August 22, 2012|title=2010 Census Gazetteer Files|url-status=dead|archive-url=https://web.archive.org/web/20140519062322/http://www.census.gov/geo/maps-data/data/docs/gazetteer/counties_list_36.txt|archive-date=May 19, 2014}}</ref> It is the second-largest county in New York by total area and occupies 66% of the land area of Long Island.

Suffolk County occupies the central and eastern part of Long Island, in the extreme east of the State of New York. The eastern end of the county splits into two [[peninsula]]s, known as the [[North Fork, Suffolk County, New York|North Fork]] and the [[South Fork, Suffolk County, New York|South Fork]]. The county is surrounded by water on three sides, including the Atlantic Ocean and [[Long Island Sound]], with {{convert|980|mi|km}} of coastline. The eastern end contains large [[bay]]s.

The highest elevation in the county, and on Long Island as a whole, is [[Jayne's Hill]] in [[West Hills, New York|West Hills]], at {{convert|401|ft|m}} above sea level. This low lying-geography means that much of the county is vulnerable to [[sea level rise]].<ref name=":0">{{Cite web|title=Suffolk to consider sea level rise in road projects|url=https://www.newsday.com/long-island/suffolk-climate-change-road-projects-1.36733374|access-date=March 10, 2021|website=Newsday|date=September 23, 2019 |language=en}}</ref>

<gallery mode="packed" heights="150">
File:Suffolk County 1683.jpg|Sign referring to Suffolk County's 1683 founding located in Peterkin Park on Oak Street in Amityville.
File:Shinnecock-locks.jpg|[[Shinnecock Canal]], located in Hampton Bays, New York
</gallery>

===Climate===
Suffolk County sits at the convergence of [[climate classification|climate zones]] including the [[humid continental]] (''Dfa'') and [[humid subtropical]] (''Cfa''), bordering closely on an oceanic climate (Cfb). The majority of the county by land area is in the ''Dfa'' zone. Summers are cooler at the [[East End (Long Island)|east end]] than in the western part of the county. The [[hardiness zone]] is 7a, except in [[Copiague Harbor]], Lindenhurst, and Montauk, where it is 7b. Average monthly temperatures in Hauppauge range from {{cvt|31.0|°F}} in January to {{cvt|74.0|°F}} in July, and in the Riverhead town center they range from {{cvt|30.1|°F}} in January to {{cvt|72.8|°F}} in July, which includes both daytime and nighttime temperatures. On February 9, 2013, Suffolk County was besieged with 30 inches of snow, making it the largest day of snowfall on record in Suffolk.<ref>{{Cite web|url=https://patch.com/new-york/bellmore/snowiest-day-record-days-long-island-saw-most-snowfall|title=Long Island's Snowiest Day Ever|date=January 21, 2020|website=Bellmore, NY Patch}}</ref>
{{Weather box
|location = Montauk, New York (1981–2010 normals)
|single line = Y
|collapsed =
|Jan high F = 38.1
|Feb high F = 40.1
|Mar high F = 45.6
|Apr high F = 54.5
|May high F = 64.2
|Jun high F = 73.3
|Jul high F = 79.3
|Aug high F = 78.9
|Sep high F = 71.9
|Oct high F = 62.6
|Nov high F = 53.0
|Dec high F = 43.6
|year high F= 58.8
|Jan mean F = 32.3
|Feb mean F = 33.7
|Mar mean F = 39.0
|Apr mean F = 47.5
|May mean F = 56.6
|Jun mean F = 66.4
|Jul mean F = 72.4
|Aug mean F = 72.2
|Sep mean F = 65.7
|Oct mean F = 56.4
|Nov mean F = 47.2
|Dec mean F = 37.9
|year mean F= 52.3
|Jan low F = 26.4
|Feb low F = 27.3
|Mar low F = 32.4
|Apr low F = 40.4
|May low F = 48.9
|Jun low F = 59.5
|Jul low F = 65.5
|Aug low F = 65.5
|Sep low F = 59.4
|Oct low F = 50.3
|Nov low F = 41.4
|Dec low F = 32.3
|year low F= 45.8
|precipitation colour= green
|Jan precipitation inch = 2.87
|Feb precipitation inch = 3.38
|Mar precipitation inch = 4.75
|Apr precipitation inch = 3.45
|May precipitation inch = 2.21
|Jun precipitation inch = 3.80
|Jul precipitation inch = 3.81
|Aug precipitation inch = 3.92
|Sep precipitation inch = 3.93
|Oct precipitation inch = 3.66
|Nov precipitation inch = 4.22
|Dec precipitation inch = 3.58
|source 1 = [[NOAA]]<ref>{{cite web|url=ftp://ftp.ncdc.noaa.gov/pub/data/normals/1981-2010/products/station/USW00054780.normals.txt|website=ftp.ncdc.noaa.gov|publisher=[[National Oceanic and Atmospheric Administration]]|archive-url=https://web.archive.org/web/20200719000427/ftp://ftp.ncdc.noaa.gov/pub/data/normals/1981-2010/products/station/USW00054780.normals.txt|archive-date=July 19, 2020|url-status=dead|title=Station Name: NY MONTAUK AP|access-date=June 27, 2013}}</ref>
}}

===Adjacent counties===
Suffolk County has [[maritime boundaries]] with five other U.S. counties and is connected by land only to Nassau County.
* [[Nassau County, New York|Nassau County]]—west
* [[Fairfield County, Connecticut|Fairfield County]], Connecticut—northwest
* [[New Haven County]], Connecticut—north
* [[Middlesex County, Connecticut|Middlesex County]], Connecticut—north
* [[New London County]], Connecticut—north
* [[Washington County, Rhode Island|Washington County]], Rhode Island—northeast

===National protected areas===
* [[Amagansett National Wildlife Refuge]]
* [[Conscience Point National Wildlife Refuge]]
* [[Elizabeth A. Morton National Wildlife Refuge]]
* [[Fire Island National Seashore]]
* [[Sayville National Wildlife Refuge]]
* [[Seatuck National Wildlife Refuge]]
* [[Target Rock National Wildlife Refuge]]
* [[Wertheim National Wildlife Refuge]]

{{wide image|FI Lighthouse pan.jpg|1000 px|Western [[Fire Island]] from [[Fire Island Lighthouse]]}}

==Demographics==
{{US Census population
|1790= 16400
|1800= 19735
|1810= 21113
|1820= 23936
|1830= 26780
|1840= 32469
|1850= 36922
|1860= 43275
|1870= 46924
|1880= 52888
|1890= 62491
|1900= 77582
|1910= 96138
|1920= 110246
|1930= 161055
|1940= 197355
|1950= 276129
|1960= 666784
|1970= 1124950
|1980= 1284231
|1990= 1321864
|2000= 1419369
|2010= 1493350
|2020= 1525920
|estimate=1535909
|estyear=2024
|align-fn=center
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=January 7, 2015}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=January 7, 2015}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ny190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=January 7, 2015}}</ref> 1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=January 7, 2015}}</ref><br />2010, 2020, and 2024<ref name=QuickFactsSuffolkCountyLI/>
}}

===Race and ethnicity===
{| class="wikitable sortable" style="text-align:center;"
|+'''Suffolk County, New York – Racial and ethnic composition'''<br><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 1980<ref name=1980Census>{{Cite web|title=1980 Census of Population - General Population Characteristics - New York - Table 15 - Persons by Race and Table 16 - Total Persons and Spanish Origin Persons by Type of Spanish Origin and Race (p. 34/29-34/70)|url=https://www2.census.gov/prod2/decennial/documents/1980/1980censusofpopu80134unse_bw.pdf|website=[[United States Census Bureau]]}}</ref>
!Pop 1990<ref name=1990Census>{{Cite web|title=1990 Census of Population - General Population Characteristics - New York - Table 3 - Race and Hispanic Origin|url=https://www2.census.gov/library/publications/decennial/1990/cp-1/cp-1-34-1.pdf|website=[[United States Census Bureau]]|pages=45–215}}</ref>
!Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Suffolk County, New York|url=https://data.census.gov/table?g=050XX00US36103&tid=DECENNIALSF12000.P004|website=[[United States Census Bureau]] |access-date= }}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Suffolk County, New York|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US36103&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!style="background-color: #ffffb3;" | Pop 2020<ref name=2020CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Suffolk County, New York|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US36103&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!% 1980
!% 1990
!% 2000
!% 2010
!style="background-color: #ffffb3;" |% 2020
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|1,141,000
|1,130,694
|1,118,405
|1,068,728
|style='background: #ffffe6; |967,330
|88.85%
|85.54%
|78.80%
|71.57%
|style='background: #ffffe6; |63.39%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|69,558
|77,303
|93,262
|102,117
|style='background: #ffffe6; |107,268
|5.42%
|5.85%
|6.57%
|6.84%
|style='background: #ffffe6; |7.03%
|-
|[[Native American]] or [[Alaska Native]] alone (NH)
|1,966
|2,592
|2,981
|2,906
|style='background: #ffffe6; |3,102
|0.15%
|0.20%
|0.21%
|0.19%
|style='background: #ffffe6; |0.20%
|-
|[[Asian Americans|Asian]] alone (NH)
|10,297
|22,415
|34,355
|50,295
|style='background: #ffffe6; |65,019
|0.80%
|1.70%
|2.42%
|3.37%
|style='background: #ffffe6; |4.26%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|x<ref>included in the Asian category in the 1980 Census</ref>
|x<ref>included in the Asian category in the 1990 Census</ref>
|260
|275
|style='background: #ffffe6; |241
|x
|x
|0.02%
|0.02%
|style='background: #ffffe6; |0.02%
|-
|[[Other race]] alone (NH)
|2,721
|1,008
|2,217
|3,041
|style='background: #ffffe6; |9,479
|0.21%
|0.08%
|0.16%
|0.20%
|style='background: #ffffe6; |0.62%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|x<ref>not an option in the 1980 Census</ref>
|x<ref>not an option in the 1990 Census</ref>
|18,478
|19,749
|style='background: #ffffe6; |40,522
|x
|x
|1.30%
|1.32%
|style='background: #ffffe6; |2.66%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|58,689
|87,852
|149,411
|246,239
|style='background: #ffffe6; |332,959
|4.57%
|6.65%
|10.53%
|16.49%
|style='background: #ffffe6; |21.82%
|-
|'''Total'''
|'''1,284,231'''
|'''1,321,864'''
|'''1,419,369'''
|'''1,493,350'''
|style='background: #ffffe6; |'''1,525,920 '''
|'''100.00%'''
|'''100.00%'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

===2010 census===
According to the [[2010 U.S. census]]<ref name="GR2">{{cite web|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=January 31, 2008|title=U.S. Census website}}</ref> there were 1,493,350 people and 569,985 households residing in the county. The census estimated Suffolk County's population decreased slightly to 1,481,093 in 2018, representing 7.5% of the census-estimated New York State population of 19,745,289<ref name=NYSQuickFacts>[https://www.census.gov/quickfacts/fact/table/kingscountybrooklynboroughnewyork,queenscountyqueensboroughnewyork,nassaucountynewyork,suffolkcountynewyork,NY/PST045218 Kings County (Brooklyn Borough), New York; Queens County (Queens Borough), New York; Nassau County, New York; Suffolk County, New York; New York QuickFacts] Accessed February 12, 2020.</ref> and 19.0% of the census-estimated Long Island population of 7,869,820.<ref name="Kings County, New York QuickFacts">{{cite web|url=http://quickfacts.census.gov/qfd/states/36/36047.html|title=Kings County, New York QuickFacts|publisher=U.S. Census Bureau|access-date=March 24, 2016|url-status=dead|archive-url=https://web.archive.org/web/20160217175357/http://quickfacts.census.gov/qfd/states/36/36047.html|archive-date=February 17, 2016}}</ref><ref name="Queens County, New York QuickFacts">{{cite web|url=http://quickfacts.census.gov/qfd/states/36/36081.html|title=Queens County, New York QuickFacts|publisher=U.S. Census Bureau|access-date=March 24, 2016|url-status=dead|archive-url=https://web.archive.org/web/20140808084246/http://quickfacts.census.gov/qfd/states/36/36081.html|archive-date=August 8, 2014}}</ref><ref name="Nassau County, New York QuickFacts">{{cite web|url=http://quickfacts.census.gov/qfd/states/36/36059.html|title=Nassau County, New York QuickFacts|publisher=U.S. Census Bureau|access-date=March 24, 2016|url-status=dead|archive-url=https://web.archive.org/web/20110607014652/http://quickfacts.census.gov/qfd/states/36/36059.html|archive-date=June 7, 2011}}</ref><ref name="U.S. Census Bureau">{{cite web|url=http://quickfacts.census.gov/qfd/states/36/36103.html|title=Suffolk County, New York QuickFacts|publisher=U.S. Census Bureau|access-date=March 24, 2016|archive-date=July 29, 2011|archive-url=https://web.archive.org/web/20110729124046/http://quickfacts.census.gov/qfd/states/36/36103.html|url-status=dead}}</ref> The population density in 2010 was {{convert|1637|/mi2|/km2|disp=preunit|people&nbsp;|people}}, with 569,985 households at an average density of {{convert|625|/sqmi|/km2|sp=us|adj=off}}. However, by 2012, with an estimated total population increasing moderately to 1,499,273 there were 569,359 housing units.<ref>http://quickfacts.census.gov/qfd/states/36/36103.html {{Webarchive|url=https://web.archive.org/web/20110729124046/http://quickfacts.census.gov/qfd/states/36/36103.html |date=July 29, 2011 }} U.S. Census, estimate for 2012, January 6, 2014</ref> As of 2006, Suffolk County was the [[list of the most populous counties in the United States|21st-most populous county in the United States]].<ref>{{Cite web|url=https://www.census.gov/popest/counties/CO-EST2006-07.html|archive-url=https://web.archive.org/web/20070505054301/http://www.census.gov/popest/counties/CO-EST2006-07.html|title=100 Largest Counties in the United States by 2006 Population Estimate|archive-date=May 5, 2007}}</ref>

By 2014, the county's racial makeup was estimated at 85.2% [[White (U.S. Census)|White]], 8.3% [[African American (U.S. census)|African American]], 0.6% [[Native American (U.S. Census)|Native American]], 4.0% [[Asian (U.S. Census)|Asian]], 0.1% [[Pacific Islander (U.S. Census)|Pacific Islander]], and 1.8% from [[Race (United States Census)|two or more races]]. Those identifying as [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]], of any race, were 18.2% of the population. Those who identified as "white alone", not being of Hispanic or Latino origin, represented 69.3% of the population.<ref name="quickfacts.census.gov">{{Cite web |url=http://quickfacts.census.gov/qfd/states/36/36103.html |title=Source U.S. Census Bureau: State and County QuickFacts. Data derived from Population Estimates, American Community Survey, Last Revised: Wednesday, October 14, 2015 16:00:26 ED |access-date=June 15, 2007 |archive-date=July 29, 2011 |archive-url=https://web.archive.org/web/20110729124046/http://quickfacts.census.gov/qfd/states/36/36103.html |url-status=dead }}</ref> In 2006, the county's racial or ethnic makeup was 83.6% White (75.4% White Non-Hispanic). African Americans were 7.4% of the population. Asians stood at 3.4% of the population. 5.4% were of other or mixed race. Latinos were 13.0% of the population.<ref>{{Cite web |url=http://quickfacts.census.gov/qfd/states/36/36103.html |title=Suffolk County QuickFacts from the US Census Bureau |access-date=June 15, 2007 |archive-date=July 29, 2011 |archive-url=https://web.archive.org/web/20110729124046/http://quickfacts.census.gov/qfd/states/36/36103.html |url-status=dead }}</ref> In 2007, Suffolk County's most common ethnicities were [[Italian American|Italian]] (29.5%), [[Irish American|Irish]] (24.0%), and [[German American|German]] (17.6%).<ref>{{Cite web |url=http://factfinder.census.gov/servlet/ADPTable?_bm=y&-context=adp&-qr_name=ACS_2007_1YR_G00_DP2&-ds_name=ACS_2007_1YR_G00_&-tree_id=307&-redoLog=true&-_caller=geoselect&-geo_id=05000US36103&-format=&-_lang=en |title=Suffolk County, New York, Selected Social Characteristics in the United States: 2007 |access-date=March 28, 2011 |archive-url=https://archive.today/20200210222755/http://factfinder.census.gov/servlet/ADPTable?_bm=y&-context=adp&-qr_name=ACS_2007_1YR_G00_DP2&-ds_name=ACS_2007_1YR_G00_&-tree_id=307&-redoLog=true&-_caller=geoselect&-geo_id=05000US36103&-format=&-_lang=en |archive-date=February 10, 2020 |url-status=dead }}</ref>

In 2002, ''[[The New York Times]]'' cited a study by the non-profit group ERASE Racism, which determined Suffolk and its neighboring county, Nassau, to be the most racially segregated suburbs in the United States.<ref>{{cite news| url=https://www.nytimes.com/2002/06/05/nyregion/study-calls-li-most-segregated-suburb.html?pagewanted=1 | work=The New York Times | title=Study Calls L.I. Most Segregated Suburb | first=Bruce | last=Lambert | date=June 5, 2002 | access-date=May 11, 2010}}</ref>

In 2006, there were 469,299 households, of which 37.00% had children under the age of 18 living with them, 62.00% were married couples living together, 10.80% had a female householder with no husband present, and 23.20% were non-families. 18.30% of all households were made up of individuals, and 7.80% had someone living alone who was 65 years of age or older. The average household size was 2.96 and the average family size was 3.36.

In the county, the population was spread out, with 26.10% under the age of 18, 7.60% from 18 to 24, 31.20% from 25 to 44, 23.30% from 45 to 64, and 11.80% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 95.90 males. For every 100 females age 18 and over, there were 92.80 males.

In 2008, ''[[Forbes]]'' magazine released its American Community Survey and named Suffolk County number 4 in its list of the top 25 richest counties in America. In 2016, according to ''[[Business Insider]]'', the 11962 zip code encompassing [[Sagaponack]], within [[Southampton, New York|Southampton]], was listed as the most expensive in the U.S., with a median home sale price of $8.5&nbsp;million.<ref>{{cite web|url=https://www.businessinsider.com/the-most-expensive-us-zip-codes-2016-3|title=The 25 most expensive ZIP codes in America|author=Raisa Bruner|website=Business Insider|date=March 7, 2016|access-date=March 9, 2016}}</ref>

The median income for a household in the county was $84,767,<ref>{{cite web |url=https://finance.yahoo.com/real-estate/article/108999/americas-richest-counties |title=America's Richest Counties |access-date=January 2, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20111106032512/http://finance.yahoo.com/real-estate/article/108999/americas-richest-counties |archive-date=November 6, 2011 }}</ref> and the median income for a family was $72,112. Males had a median income of $50,046 versus $33,281 for females. The per capita income for the county was $26,577. Using a weighted average from 2009 to 2014 about 6.40% of the population were below the poverty line<ref name="quickfacts.census.gov"/> In earlier censuses, the population below the poverty line included 2.70% of those under age 18 and 2.30% of those age 65 or over.

{| class="wikitable sortable" style="text-align:right; font-size:85%;"
|+align=top|[[Race (United States Census)|Racial groups]], ethnicity, and religious groups on Long Island<br />compared to state and nation
|-
! align=left|Place<br />
! Population<br />2010<br />census<br />
! %<br />white<br />
! %<br />black<br />or<br />African<br />American<br />
! %<br />Asian<br />
! %<br />Other<br />
! %<br />mixed<br />race<br />
! %<br />Hispanic/<br />Latino<br />of any<br />race<br />
! class="unsortable" |
! %<br />[[Catholic]]<br />
! % not<br />affiliated<br />
! %<br />Jewish<br />
! %<br />[[Protestant]]<br />
! Estimate<br />of % not<br />reporting
|-
|colspan=2|
| colspan="5" style="text-align:center;"|'''Race'''
|align=center|'''Ethnicity'''
|
| colspan="5" style="text-align:center;"|'''Religious groups'''
|-
|align=left|[[Nassau County, New York|Nassau County]] ||1,339,532||73.0||11.1||7.6||5.9||2.4||14.6|| ||52||9||17||7||15
|-
|align=left|Suffolk County||1,493,350||80.8||7.4||3.4||5.9||2.4||16.5|| ||52||21||7||8||11
|-
|align=left|'''Long Island Total'''<br />(including Brooklyn and Queens)||7,568,304||54.7||20.4||12.3||9.3||3.2||20.5|| ||40||18||15||7||20
|-
|align=left|'''NY State'''||19,378,102||65.7||15.9||7.3||8.0||3.0||17.6|| ||42||20||9||10||16
|-
|align=left|'''USA'''||308,745,538||72.4||12.6||4.8||7.3||2.9||16.3|| ||22||37||2||23||12
|-
| colspan="14" style="text-align:center;"|Source for Race and Ethnicity: 2010 Census<ref>{{Cite web|url=https://www.census.gov/prod/cen2010/briefs/c2010br-02.pdf|title=2010 Census brief}}</ref><br /><small>American Indian, Native Alaskan, Native Hawaiian, and Pacific Islander make up just 0.5% of the population of Long Island, and have been included with "Other".</small>
|-
| colspan="14" style="text-align:center;"|Source for religious groups: ARDA2000<ref name=ARDA2000>{{cite web |url=http://www.thearda.com/mapsReports/reports/selectCounty.asp?state=36&county=25001 |title=The Association of Religion Data Archives (ARDA), Year 2000 Report |access-date=December 5, 2012 |archive-date=January 16, 2009 |archive-url=https://web.archive.org/web/20090116054231/http://www.thearda.com/mapsReports/reports/selectCounty.asp?state=36&county=25001 |url-status=dead }} Churches were asked for their membership numbers. ARDA estimates that most of the churches not reporting were black Protestant congregations.</ref><ref>{{Cite web|url=http://www.thearda.com/mapsReports/reports/US_2000.asp|title=The Association of Religion Data Archives (ARDA), Year 2000 Report|access-date=December 5, 2012|archive-date=December 11, 2018|archive-url=https://web.archive.org/web/20181211231432/http://www.thearda.com/mapsReports/reports/US_2000.asp|url-status=dead}}</ref>
|}

==Law and government==
{{PresHead|place=Suffolk County, New York|source=<ref name="uselectionatlas.org">{{Cite web|url=http://uselectionatlas.org/RESULTS|title=Dave Leip's Atlas of U.S. Presidential Elections|last=Leip|first=David|website=uselectionatlas.org|access-date=October 25, 2018}}</ref>}}
<!-- PresRow should be {{PresRow|Year|Winning party|GOP vote #|Dem vote #|3rd party vote #|State}} -->
{{PresRow|2024|Republican|417,549|341,812|3,488|New York}}
{{PresRow|2020|Republican|381,253|381,021|11,013|New York}}
{{PresRow|2016|Republican|350,570|303,951|26,733|New York}}
{{PresRow|2012|Democratic|282,131|304,079|8,056|New York}}
{{PresRow|2008|Democratic|307,021|346,549|6,209|New York}}
{{PresRow|2004|Democratic|309,949|315,909|12,854|New York}}
{{PresRow|2000|Democratic|240,992|306,306|26,646|New York}}
{{PresRow|1996|Democratic|182,510|261,828|60,875|New York}}
{{PresRow|1992|Republican|229,467|220,811|117,677|New York}}
{{PresRow|1988|Republican|311,242|199,215|3,893|New York}}
{{PresRow|1984|Republican|335,485|171,295|1,276|New York}}
{{PresRow|1980|Republican|256,294|149,945|43,416|New York}}
{{PresRow|1976|Republican|248,908|208,263|2,877|New York}}
{{PresRow|1972|Republican|316,452|132,441|1,005|New York}}
{{PresRow|1968|Republican|218,027|122,590|34,150|New York}}
{{PresRow|1964|Democratic|144,350|180,598|385|New York}}
{{PresRow|1960|Republican|166,644|114,033|268|New York}}
{{PresRow|1956|Republican|167,805|48,323|0|New York}}
{{PresRow|1952|Republican|115,570|39,120|262|New York}}
{{PresRow|1948|Republican|75,519|29,104|3,642|New York}}
{{PresRow|1944|Republican|65,650|31,231|253|New York}}
{{PresRow|1940|Republican|63,712|33,853|270|New York}}
{{PresRow|1936|Republican|48,970|33,078|2,287|New York}}
{{PresRow|1932|Republican|40,247|30,799|1,482|New York}}
{{PresRow|1928|Republican|41,199|19,497|2,619|New York}}
{{PresRow|1924|Republican|31,456|10,024|3,975|New York}}
{{PresRow|1920|Republican|26,737|8,852|985|New York}}
{{PresRow|1916|Republican|12,742|8,422|358|New York}}
{{PresRow|1912|Democratic|5,595|7,878|6,182|New York}}
{{PresRow|1908|Republican|10,689|5,877|1,164|New York}}
{{PresRow|1904|Republican|9,937|6,795|642|New York}}
{{PresRow|1900|Republican|9,584|5,711|615|New York}}
{{PresRow|1896|Republican|9,388|3,872|837|New York}}
{{PresRow|1892|Republican|7,001|6,274|928|New York}}
{{PresRow|1888|Republican|7,167|6,600|500|New York}}
{{PresRow|1884|Democratic|5,876|6,429|510|New York}}
|}
{| class=wikitable
! colspan = 6 | Active Voter Registration and Party Enrollment as of February 20, 2025<ref>{{cite web |title=Enrollment by County |url=https://elections.ny.gov/enrollment-county |website=New York State Board of Elections |access-date=April 6, 2025}}</ref>
|-
! colspan = 2 | Party
! Number of voters
! Percentage
|-
| {{party color cell|Democratic Party (United States)}}
| [[Democratic Party (United States)|Democratic]]
| style="text-align:center;"| 360,671
| style="text-align:center;"| 33.21%
|-
| {{party color cell|Republican Party (United States)}}
| [[Republican Party (United States)|Republican]]
| style="text-align:center;"| 341,008
| style="text-align:center;"| 31.40%
|-
| {{party color cell|Independent Party (United States)}}
| Unaffiliated
| style="text-align:center;"| 327,373
| style="text-align:center;"| 30.14%
|-
| {{party color cell| Conservative Party (United States)}}
| [[Conservative Party (New York State)|Conservative]]
| style="text-align:center;"| 20,641
| style="text-align:center;"| 1.90%
|-
! style="background:{{party color|Working Families Party}}; width:3px;"|
| style="width: 130px" | [[Working Families]]
| style="text-align:center;"| 4,178
| style="text-align:center;"| 0.38%
|-
| {{party color cell|Other parties (US)}}
|[[List of political parties in the United States|Other]]
| align=center | 32,170
| align=center | 2.96%
|-
! colspan = 2 | Total
! style="text-align:center;"| 1,086,041
! style="text-align:center;"| 100%
|}
{| class=wikitable
|+County officials
|-
! colspan=2 align=center valign=bottom | Position
! style="text-align:center;" | Name
! valign=bottom | Party
! valign=bottom| Term
|-
| style="background-color:{{party color|Democratic Party (United States)}}" |&nbsp;
| Sheriff
| [[Errol D. Toulon Jr.]]
| Dem
| 2018–present
|-
| style="background-color:{{party color|Republican Party (United States)}}" |&nbsp;
| District Attorney
| Raymond A. Tierney
| Rep
| 2022–present
|-
| style="background-color:{{party color|Republican Party (United States)}}" |&nbsp;
| County Clerk
| Vincent A. Puleo
| Rep
| 2023–present
|-
| style="background-color:{{party color|Republican Party (United States)}}" |&nbsp;
| Comptroller
| John M. Kennedy Jr.
| Rep
| 2015–present
|}

===State Senate Officials for Suffolk County===
{| class="wikitable"
|-
! District
! Senator
! Party
|- {{Party shading/Republican}}
| [[New York's 1st State Senate district|1]] || [[Anthony Palumbo]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 2nd State Senate district|2]] || [[Mario Mattera]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 3rd State Senate district|3]] || [[L. Dean Murray]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Democratic}}
| [[New York's 4th State Senate district|4]] || [[Monica Martinez]] || [[Democratic Party (United States)|Democratic]]
|- {{Party shading/Republican}}
| [[New York's 8th State Senate district|8]] || [[Alexis Weik]] || [[Republican Party (United States)|Republican]]
|}

===State Assembly Officials for Suffolk County===
{| class="wikitable"
|-
! District
! Representative
! Party
|- {{Party shading/Democratic}}
| [[New York's 1st State Assembly district|1]] || [[T. John Schiavoni]] || [[Democratic Party (United States)|Democratic]]
|- {{Party shading/Republican}}
| [[New York's 2nd State Assembly district|2]] || [[Jodi Giglio]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 3rd State Assembly district|3]] ||[[Joe DeStefano]]||[[Republican Party (United States)|Republican]]
|- {{Party shading/Democratic}}
| [[New York's 4th State Assembly district|4]] ||[[Rebecca Kassay]]||[[Democratic Party (United States)|Democratic]]
|- {{Party shading/Republican}}
| [[New York's 5th State Assembly district|5]] || [[Douglas M. Smith]] ||[[Republican Party (United States)|Republican]]
|- {{Party shading/Democratic}}
| [[New York's 6th State Assembly district|6]] ||[[Philip Ramos]]||[[Democratic Party (United States)|Democratic]]
|- {{Party shading/Republican}}
| [[New York's 7th State Assembly district|7]] ||[[Jarett Gandolfo]]||[[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 8th State Assembly district|8]] || [[Michael J. Fitzpatrick (politician)|Michael Fitzpatrick]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 9th State Assembly district|9]] ||[[Michael Durso]]||[[Republican Party (United States)|Republican]]
|- {{Party shading/Democratic}}
| [[New York's 10th State Assembly district|10]] ||[[Steven H. Stern]]||[[Democratic Party (United States)|Democratic]]
|- {{Party shading/Democratic}}
| [[New York's 11th State Assembly district|11]] ||[[Kwani O'Pharrow]]||[[Democratic Party (United States)|Democratic]]
|- {{Party shading/Republican}}
| [[New York's 12th State Assembly district|12]] ||[[Keith Brown (New York politician)|Keith Brown]]||[[Republican Party (United States)|Republican]]
|}

===United States House of Representatives Officials for Suffolk County===
{| class="wikitable"
|-
! District
! Representative
! Party
|- {{Party shading/Republican}}
| [[New York's 1st congressional district|1]] || [[Nick LaLota]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Republican}}
| [[New York's 2nd congressional district|2]] || [[Andrew Garbarino]] || [[Republican Party (United States)|Republican]]
|- {{Party shading/Democratic}}
| [[New York's 3rd congressional district|3]] || [[Tom Suozzi]] || [[Democratic Party (United States)|Democratic]]
|}

===United States Senate===
{| class="wikitable"
|-
! Senator !! Party
|- {{Party shading/Democratic}}
| [[Chuck Schumer]] || [[Democratic Party (United States)|Democratic]]
|- {{Party shading/Democratic}}
| [[Kirsten Gillibrand]] || [[Democratic Party (United States)|Democratic]]
|}
In 2003, Democrat [[Steve Levy (politician)|Steve Levy]] was elected county executive, ending longtime Republican control. In 2001, Democrat Thomas Spota was elected District Attorney, and ran unopposed in 2005. Although Suffolk voters gave [[George H. W. Bush]] a victory here in 1992, the county voted for [[Bill Clinton]] in 1996 and continued the trend by giving [[Al Gore]] an 11-percent victory in the county in 2000. 2004 Democratic candidate [[John Kerry]] won by a much smaller margin of under one percent, in 2008 Democratic candidate [[Barack Obama]] won by a slightly larger 6 percent margin, 52.5%-46.5%. In 2012, he carried the county by a slightly smaller margin 51%-47%. In 2016, Republican candidate [[Donald Trump]] won Suffolk County by a 6.9 percent margin, becoming the first Republican to carry the county since 1992. In 2020, Trump again won Suffolk County; this time, however, it was decided by just 232 votes out of nearly 800,000 votes cast, making it the closest county in the nation in terms of percentage margin, and representing nearly a seven-point swing towards the Democratic ticket of former Vice President [[Joe Biden]] and junior California senator [[Kamala Harris]]. In percentage terms, it was the closest county in the state, although [[Ontario County, New York|Ontario County]] and [[Warren County, New York|Warren County]] had narrower raw vote margins of just 33 and 57 votes, respectively. Suffolk was one of five counties in the state that Trump won by less than 500 votes. With [[Tarrant County, Texas]] and [[Maricopa County, Arizona]] flipping Democratic in 2020, Suffolk County was the most populous county in the nation to vote for Trump in 2020. In 2024, Trump won 54% of the vote in Suffolk county, the highest percentage since 1988.

As a whole, both Suffolk and Nassau counties are considered swing counties. However, until 2016, they tended not to receive significant attention from presidential candidates, as the state of New York has turned reliably Democratic at the national level. In 2008 and 2012, [[Hofstra University]] in [[Nassau County, New York|Nassau County]] hosted a presidential debate. Hofstra hosted the first debate of the 2016 presidential election season, on September 26, 2016, making Hofstra the first college or university in the United States to host a presidential debate in three consecutive elections. The presence on the 2016 ticket of Westchester County resident Hillary Clinton and Manhattan resident Donald Trump resulted in greater attention by the candidates to the concerns of Long Island. Trump visited Long Island voters and donors at least four times while Clinton made one stop for voters and one additional stop in the Hamptons for donors.

After the 2022 midterm election results were counted, Suffolk appears to have moved further to the right. Republican gubernatorial candidate and Suffolk County native Lee Zeldin won the county by more than 17 points over the Democratic candidate Kathy Hochul.<ref>{{Cite web |title=NYS Board of Elections Unofficial Election Night Results |url=https://nyenr.elections.ny.gov/ |access-date=November 25, 2022 |website=nyenr.elections.ny.gov |archive-date=November 20, 2018 |archive-url=https://web.archive.org/web/20181120174014/https://nyenr.elections.ny.gov/ |url-status=dead }}</ref> Republicans, as of 2024, hold both congressional districts covering that being [[New York's 1st congressional district]] represented by [[Nick LaLota]] and [[New York's 2nd congressional district]] represented by [[Andrew Garbarino]].

The 2023 election saw this trend continue, with Republican Edward P. Romaine defeating Democrat David Calone by 14 points to become the next County Executive.<ref>{{Cite web |title=Election Results |url=https://apps2.suffolkcountyny.gov/boe/eleres/23ge/index.html#at/0541e6cf-d5f5-402d-bc88-4fbaae88332d/ar/14005/ct/1002 |access-date=November 8, 2023 |website=apps2.suffolkcountyny.gov}}</ref> Republicans also gained a 12-6 supermajority in the County Legislature, seeing a net gain of one seat.

===Suffolk County Executives===
[[File:Dennison-building-dog.jpg|thumb|H. Lee Dennison County Executive Building in [[Hauppauge]]]]
{| class="wikitable" style="text-align:center"
|+ '''Suffolk County Executives'''
|-
! Name
! Party
! Term
|- {{Party shading/Democratic}}
| [[H. Lee Dennison]]
| [[Democratic Party (United States)|Democratic]]
| 1960–1972
|- {{Party shading/Republican}}
| [[John V.N. Klein]]
| [[Republican Party (United States)|Republican]]
| 1972–1979
|- {{Party shading/Republican}}
| [[Peter F. Cohalan]]
| [[Republican Party (United States)|Republican]]
| 1980–1986
|- {{Party shading/Republican}}
| [[Michael A. LoGrande]]*
| [[Republican Party (United States)|Republican]]
| 1986–1987
|- {{Party shading/Democratic}}
| [[Patrick G. Halpin]]
| [[Democratic Party (United States)|Democratic]]
| 1988–1991
|- {{Party shading/Republican}}
| [[Robert J. Gaffney]]
| [[Republican Party (United States)|Republican]]
| 1992–2003
|- {{Party shading/Democratic}}
| [[Steve Levy (politician)|Steve Levy]]**
| [[Democratic Party (United States)|Democratic]]
| 2004–2010
|- {{Party shading/Republican}}
| [[Steve Levy (politician)|Steve Levy]]**
| [[Republican Party (United States)|Republican]]
| 2010–2011
|- {{Party shading/Democratic}}
| [[Steve Bellone]]
| [[Democratic Party (United States)|Democratic]]
| 2012–2023
|- {{Party shading/Republican}}
| Edward P. Romaine
| [[Republican Party (United States)|Republican]]
| 2024–present
|}
''* Appointed to complete Cohalan's term.''

''** Levy was originally elected as a Democrat, but became a Republican in 2010.''

===Suffolk County Legislature===
The county has 18 [[legislative]] districts, each represented by a legislator. As of 2024, there are 10 [[Republican Party (United States)|Republicans]], 6 [[Democratic Party (United States)|Democrats]], and 2 [[Conservative Party (New York State)|Conservative]].

==== Historical composition of the Suffolk County Legislature ====
{| class="wikitable sortable mw-collapsible mw-collapsed"
|-
! Year
| [https://www.scnylegislature.us/DocumentCenter/View/89141/Legislative-District-01-PDF 1]
| [https://www.scnylegislature.us/DocumentCenter/View/89142/Legislative-District-02-PDF 2]
| [https://www.scnylegislature.us/DocumentCenter/View/89143/Legislative-District-03-PDF 3]
| [https://www.scnylegislature.us/DocumentCenter/View/89144/Legislative-District-04-PDF 4]
| [https://www.scnylegislature.us/DocumentCenter/View/89145/Legislative-District-05-PDF 5]
| [https://www.scnylegislature.us/DocumentCenter/View/89146/Legislative-District-06-PDF 6]
| [https://www.scnylegislature.us/DocumentCenter/View/89147/Legislative-District-07-PDF 7]
| [https://www.scnylegislature.us/DocumentCenter/View/89148/Legislative-District-08-PDF 8]
| [https://www.scnylegislature.us/DocumentCenter/View/89149/Legislative-District-09-PDF 9]
| [https://www.scnylegislature.us/DocumentCenter/View/89150/Legislative-District-10-PDF 10]
| [https://www.scnylegislature.us/DocumentCenter/View/89151/Legislative-District-11-PDF 11]
| [https://www.scnylegislature.us/DocumentCenter/View/89152/Legislative-District-12-PDF 12]
| [https://www.scnylegislature.us/DocumentCenter/View/89153/Legislative-District-13-PDF 13]
| [https://www.scnylegislature.us/DocumentCenter/View/89154/Legislative-District-14-PDF 14]
| [https://www.scnylegislature.us/DocumentCenter/View/89155/Legislative-District-15-PDF 15]
| [https://www.scnylegislature.us/DocumentCenter/View/89156/Legislative-District-16-PDF 16]
| [https://www.scnylegislature.us/DocumentCenter/View/89157/Legislative-District-17-PDF 17]
| [https://www.scnylegislature.us/DocumentCenter/View/89158/Legislative-District-18-PDF 18]
| Partisan Breakdown
|-
| 2024
| {{party shading/Republican}} | Catherine Stark (R)
| {{party shading/Democratic}} | Ann Welker (D)
| {{party shading/Republican}} | James Mazzarella (R)
| {{party shading/Conservative}} | Nicholas Caracappa (MajL) (C)
| {{party shading/Democratic}} | [[Steven Englebright]] (D)
| {{party shading/Conservative}} | Chad Lennon (C)
| {{party shading/Republican}} | Dominick Thorne (R)
| {{party shading/Republican}} | Anthony Piccirillo (R)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Trish Bergin (R)
| {{party shading/Republican}} | Steven J. Flotteron (DPO) (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (PO)(R)
| {{party shading/Democratic}} | Jason Richberg (MinL) (D)
| {{party shading/Democratic}} | Rebecca Sanin (D)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Republican}} | Stephanie Bontempi (R)
| {{party shading/Republican}} | 12-6 Republican
|-
| 2023
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | James Mazzarella (R)
| {{party shading/Conservative}} | Nicholas Caracappa (MajL) (C)
| {{party shading/Democratic}} | [[Kara Hahn]] (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Republican}} | Dominick Thorne (R)
| {{party shading/Republican}} | Anthony Piccirillo (R)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Trish Bergin (R)
| {{party shading/Republican}} | Steven J. Flotteron (DPO) (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (PO)(R)
| {{party shading/Democratic}} | Jason Richberg (MinL) (D)
| {{party shading/Republican}} | Manuel Esteban (R)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Republican}} | Stephanie Bontempi (R)
| {{party shading/Republican}} | 11-7 Republican
|-

| 2022
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | James Mazzarella (R)
| {{party shading/Conservative}} | Nicholas Caracappa (MajL) (C)
| {{party shading/Democratic}} | Kara Hahn (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Republican}} | Dominick Thorne (R)
| {{party shading/Republican}} | Anthony Piccirillo (R)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Trish Bergin (R)
| {{party shading/Republican}} | Steven J. Flotteron (DPO) (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (PO)(R)
| {{party shading/Democratic}} | Jason Richberg (MinL) (D)
| {{party shading/Republican}} | Manuel Esteban (R)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Republican}} | Stephanie Bontempi (R)
| {{party shading/Republican}} | 11-7 Republican
|-

| 2021
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | James Mazzarella (R)
| {{party shading/Conservative}} | Nicholas Caracappa (C)
| {{party shading/Democratic}} | Kara Hahn (DPO) (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | [[Robert Calarco]] (PO) (D)
| {{party shading/Republican}} | Anthony Piccirillo (R)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Steven J. Flotteron (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL)(R)
| {{party shading/Democratic}} | Jason Richberg (D)
| {{party shading/Democratic}} | Susan A. Berland (MajL)(D)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Democratic}} | [[William R. Spencer]] (D)
| {{party shading/Democratic}} | 10-8 Democratic
|-

| 2020
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | Rudy Sunderman (R)
| {{party shading/Republican}} | [[Thomas Muratore]] (R)
| {{party shading/Democratic}} | Kara Hahn (DPO) (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (PO) (D)
| {{party shading/Republican}} | Anthony Piccirillo (R)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Tom Cilmi (MinL) (R)
| {{party shading/Republican}} | Steven J. Flotteron (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (R)
| {{party shading/Democratic}} | Jason Richberg (D)
| {{party shading/Democratic}} | Susan A. Berland (MajL)(D)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 10-8 Democratic
|-

| 2019
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | Rudy Sunderman (R)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | [[William J. Lindsay III]] (D)
| {{party shading/Democratic}} | Samuel Gonzalez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Steven J. Flotteron (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | [[DuWayne Gregory]](PO) (D)
| {{party shading/Democratic}} | Susan A. Berland (MajL)(D)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 11-7 Democratic
|-

| 2018
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Republican}} | Rudy Sunderman (R)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | Monica R. Martinez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Steven J. Flotteron (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | DuWayne Gregory (PO) (D)
| {{party shading/Democratic}} | Susan A. Berland (MajL) (D)
| {{party shading/Democratic}} | Tom Donnelly (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 11-7 Democratic
|-

| 2017
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | Monica R. Martinez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | [[Thomas F. Barraga]] (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | DuWayne Gregory (PO) (D)
| {{party shading/Democratic}} | [[Steven H. Stern]] (D)
| {{party shading/Democratic}} | [[Louis D'Amaro]] (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2016
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Democratic}} | Bridget Fleming (D)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | Monica R. Martinez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | DuWayne Gregory (PO) (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2015
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Independence}} | Jay Schneiderman (DPO) (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | Monica R. Martinez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | Leslie Kennedy (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | DuWayne Gregory (PO) (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2014
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Independence}} | Jay Schneiderman (DPO) (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (MajL)(D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (DPO) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | Monica R. Martinez (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | [[John M. Kennedy, Jr.]] (MinL) (R)
| {{party shading/Republican}} | Robert Trotta (R)
| {{party shading/Republican}} | Kevin J. McCaffrey (MinL) (R)
| {{party shading/Democratic}} | DuWayne Gregory (PO) (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2013
| {{party shading/Democratic}} | Al Krupski (D)
| {{party shading/Independence}} | Jay Schneiderman (DPO) (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Kara Hahn (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (MajL) (D)
| {{party shading/Democratic}} | William J. Lindsay III (D)
| {{party shading/Democratic}} | [[Ricardo Montano]] (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (MinL) (R)
| {{party shading/Republican}} | [[Lynne C. Nowick]] (R)
| {{party shading/Democratic}} | [[Wayne R. Horsley]] (PO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 13-5 Democratic
|-

| 2012
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Independence}} | Jay Schneiderman (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | [[Vivian Viloria-Fisher]] (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Democratic}} | Robert Calarco (D)
| {{party shading/Democratic}} | [[William J. Lindsay]](PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (MinL) (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | William R. Spencer (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2011
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Independence}} | Jay Schneiderman (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Democratic}} | Sarah Anker (D)
| {{party shading/Independence}} | [[Jack Eddington]] (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (MinL) (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | [[Jon Cooper (New York politician)|Jon Cooper]] (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-
| 2010
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Independence}} | Jay Schneiderman (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Thomas Muratore (R)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | [[Daniel P. Losquadro]] (MinL) (R)
| {{party shading/Independence}} | Jack Eddington (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Tom Cilmi (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Democratic}} | 11-7 Democratic
|-

| 2009
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Independence}} | Jay Schneiderman (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Democratic}} | Brian Beedenbender (D)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | Daniel P. Losquadro (MinL) (R)
| {{party shading/Independence}} | Jack Eddington (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | [[Cameron Alden]] (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2008
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Independence}} | Jay Schneiderman (I)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Democratic}} | Brian Beedenbender (D)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | Daniel P. Losquadro (MinL) (R)
| {{party shading/Independence}} | Jack Eddington (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Cameron Alden (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | DuWayne Gregory (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Democratic}} | 12-6 Democratic
|-

| 2007
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Republican}} | Jay Schneiderman (R)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | [[Joseph T. Caracappa]] (R)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | Daniel P. Losquadro (MinL) (R)
| {{party shading/Independence}} | Jack Eddington (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Cameron Alden (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | Elie Mystal (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Democratic}} | 10-8 Democratic
|-

| 2006
| {{party shading/Republican}} | Edward P. Romaine (R)
| {{party shading/Republican}} | Jay Schneiderman (R)
| {{party shading/Working Families}} | Kate M. Browning (WF)
| {{party shading/Republican}} | Joseph T. Caracappa (R)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | Daniel P. Losquadro (MinL) (R)
| {{party shading/Independence}} | Jack Eddington (I)
| {{party shading/Democratic}} | William J. Lindsay (PO) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Cameron Alden (R)
| {{party shading/Republican}} | Thomas F. Barraga (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | Wayne R. Horsley (DPO) (D)
| {{party shading/Democratic}} | Elie Mystal (D)
| {{party shading/Democratic}} | Steven H. Stern (D)
| {{party shading/Democratic}} | Louis D'Amaro (D)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Democratic}} | 10-8 Democratic
|-

| 2005
| {{party shading/Republican}} | [[Michael J. Caracciolo]] (R)
| {{party shading/Republican}} | Jay Schneiderman (R)
| {{party shading/Republican}} | [[Peter O'Leary (New York politician)|Peter O'Leary]] (MajL) (R)
| {{party shading/Republican}} | Joseph T. Caracappa (PO) (R)
| {{party shading/Democratic}} | Vivian Viloria-Fisher (D)
| {{party shading/Republican}} | Daniel P. Losquadro (R)
| {{party shading/Democratic}} | [[Brian X. Foley]] (D)
| {{party shading/Democratic}} | William J. Lindsay (MinL) (D)
| {{party shading/Democratic}} | Ricardo Montano (D)
| {{party shading/Republican}} | Cameron Alden (R)
| {{party shading/Republican}} | [[Angie Carpenter]] (R)
| {{party shading/Republican}} | John M. Kennedy, Jr. (R)
| {{party shading/Republican}} | Lynne C. Nowick (R)
| {{party shading/Democratic}} | [[David Bishop (New York politician)|David Bishop]] (D)
| {{party shading/Democratic}} | Elie Mystal (D)
| {{party shading/Republican}} | [[Allan Binder]] (R)
| {{party shading/Republican}} | [[Paul J. Tonna]] (R)
| {{party shading/Democratic}} | Jon Cooper (D)
| {{party shading/Republican}} | 11-7 Republican
|-
|}

Republicans controlled the county legislature until a landmark election in November 2005 where three Republican seats switched to the Democrats, giving them control. In November 2007, the Democratic Party once again retained control over the Suffolk County Legislature, picking up one seat in the process. In November 2009, the Republican Party regained the seat lost in 2007 but remained in the minority for the 2010-2011 session. In November 2011, the Democratic Party maintained control over the Suffolk County Legislature picking up one seat that had been held by an Independence Party member. In November 2013, the Republican Party gained the 14th district seat, but remained in the minority until 2021, when the GOP flipped the county legislature, picking up three seats with incumbents Robert Calarco (the sitting Presiding Officer) and Susan Berland (the sitting Majority Leader) losing their bids for re-election.<ref>{{Cite web|url=https://www.newsday.com/amp/long-island/politics/suffolk-nassau-legislature-elections-1.50410597|title=GOP control both Suffolk, Nassau county legislatures|date=November 4, 2021 }}</ref><ref>{{Cite web|url=https://riverheadlocal.com/2021/11/03/suffolks-red-wave-republicans-capture-da-and-12-of-18-legislative-districts/|title=Suffolk's 'red wave': Republicans capture DA, and 12 of 18 legislative districts|first=Denise|last=Civiletti|date=November 3, 2021}}</ref> The Suffolk GOP built on these gains in the 2023 general election, gaining a 12-6 supermajority.

===Law enforcement===
[[File:Suffolk County New York Police Boat on Fire Island.jpg|thumb|A Suffolk County police boat docked on Fire Island]]

Police services in the five western towns ([[Babylon, New York|Babylon]], [[Huntington, New York|Huntington]], [[Islip (town), New York|Islip]], [[Smithtown, New York|Smithtown]] and [[Brookhaven, New York|Brookhaven]]) are provided primarily by the [[Suffolk County Police Department]]. The five "East End" towns ([[Riverhead (town), New York|Riverhead]], [[Southold, New York|Southold]], [[Shelter Island, New York|Shelter Island]], [[East Hampton, New York|East Hampton]], and [[Southampton, New York|Southampton]]), maintain their own police and other law enforcement agencies. Also, there are a number of villages, such as [[Amityville]], [[Asharoken]], [[Lloyd Harbor]], [[Northport, New York|Northport]], and [[Westhampton Beach]] that maintain their own police forces. In 1994, the [[Greenport, Suffolk County, New York|Village of Greenport]] voted to abolish its police department and turn responsibility for law and order over to the [[Southold, New York|Southold]] police department.

After the [[Long Island State Parkway Police]] was disbanded in 1980, all state parkways in Suffolk County became the responsibility of Troop L of the [[New York State Police]], headquartered at [[Republic Airport]]. State parks, such as [[Robert Moses State Park]], are the responsibility of the [[New York State Park Police]], based at [[Belmont Lake State Park]]. In 1996, the [[Long Island Rail Road]] Police Department was consolidated into the [[Metropolitan Transportation Authority Police]], which has jurisdiction over all rail lines in the county. Since the New York state legislature created the [[New York State University Police]] in 1999, they are in charge of all law enforcement services for State University of New York property and campuses. The State University Police have jurisdiction in Suffolk County at Stony Brook University and Farmingdale State College.

The Suffolk County Sheriff's Office is a separate agency. The sheriff, an elected official who serves a four-year term, operates the two Suffolk County correctional facilities (in [[Yaphank]] and [[Riverhead, New York|Riverhead]]), provides county courthouse security and detention, service and enforcement of civil papers, evictions and warrants. The Sheriff's Office is also responsible for securing all county-owned property, such as county government office buildings, as well as the campuses of the [[Suffolk County Community College]]. As of 2008, the Suffolk County Sheriff's Office employed 275 Deputy Sheriffs, 850 corrections officers, and about 200 civilian staff.

Suffolk County has a long maritime history with several [[outer barrier]] beaches and hundreds of square miles of [[waterways]]. The Suffolk Police Marine Bureau patrols the {{convert|500|sqmi|km2|sigfig=1}} of navigable waterways within the police district, from the [[Connecticut]] and [[Rhode Island]] state line which bisects [[Long Island Sound]]<ref>{{Cite web|url=https://www.google.com/maps?q=Fishers+island&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&sa=N&hl=en&tab=wl|title=Google Maps|publisher=Google Maps}}</ref> to the New York state line {{convert|3|mi|km|0}} south of Fire Island in the Atlantic Ocean. Some Suffolk County towns (Islip, Brookhaven, Southampton, East Hampton, Babylon, Huntington, Smithtown) also employ various bay constables and other local marine patrol, which are sworn armed peace officers with full arrest powers, providing back up to the Suffolk Police Marine Bureau as well as the [[United States Coast Guard]].

This includes [[Fire Island]] and parts of [[Jones Island (New York)|Jones Island]] barrier beaches and the islands of the [[Great South Bay]]. Marine units also respond to water and ice rescues on the inland lakes, ponds, and streams of the District.

In February 2019, legislator Robert Trotta (R-[[Fort Salonga]]) put forward a resolution to recover salary and benefits from James Burke, the county's former police chief.<ref name=autogenerated1>{{Cite web|url=https://tbrnewsmedia.com/motion-to-sue-ex-suffolk-police-chief-burke-over-1-5m-settlement-tabled/|title=Motion to sue ex-Suffolk Police Chief Burke over $1.5M settlement tabled &#124; TBR News Media|first=Sara-Megan|last=Walsh|date=December 20, 2018 }}</ref><ref name=autogenerated2>{{Cite web|url=https://www.wshu.org/post/bill-would-enable-suffolk-county-recoup-salary-ex-police-chief|title=Bill Would Enable Suffolk County To Recoup Salary From Ex-Police Chief|first=Jay|last=Shah|website=wshu.org|date=February 11, 2019}}</ref> Burke had pled guilty to beating a man while in police custody and attempting to conceal it, and the county had paid the victim $1.5&nbsp;million in a settlement; it had also paid Burke more than $500,000 in benefits and salary while Burke was concealing his conduct.<ref name=autogenerated2 /><ref name=autogenerated1 /> Trotta said that the [[faithless servant]] doctrine in New York common law gave him the power to [[claw back]] the compensation.<ref name=autogenerated2 /> The Suffolk County Legislature supported the suit unanimously.<ref>{{Cite web|url=https://www.newsday.com/long-island/politics/james-burke-suffolk-county-lawsuit-1.28113528|title=Lawmakers vote to sue to recoup Burke salary|website=Newsday|date=March 5, 2019 }}</ref> The following month Suffolk County Executive [[Steve Bellone]] signed the bill.

Also in February 2019, a court ruled against the Suffolk County jail in the case of a former inmate who was denied [[hormone replacement therapy]] by the jail's doctors. Documents introduced in the trial indicate 11 other inmates were also denied treatment.<ref>{{Cite news|last=Leland|first=John|date=February 15, 2019|title=How a Trans Soldier Took On the Jail That Denied Her Medication, and Won|language=en-US|work=The New York Times|url=https://www.nytimes.com/2019/02/15/nyregion/transgender-jail-hormone-therapy.html|access-date=October 31, 2021|issn=0362-4331}}</ref>

===Courts===
[[File:CI-Courts.JPG|thumb|Cohalan Court Complex in Central Islip]]

Suffolk County is part of the 10th Judicial District of the [[New York State Unified Court System]]; is home to the [[Alfonse M. D'Amato United States Courthouse|Alfonse M. D'Amato Courthouse]] of the Federal U.S. District Court, Eastern District of New York;<ref>"{{cite web |url=http://www.nyed.uscourts.gov/probono/Locations/locations.html |title=Court Locations |access-date=August 22, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20110927110840/http://www.nyed.uscourts.gov/probono/Locations/locations.html |archive-date=September 27, 2011 |df=mdy-all }}".</ref> and has various local municipal courts. The State Courts are divided into Supreme Court, which has general jurisdiction over all cases, and lower courts that either hear claims of a limited dollar amount, or of a specific nature.<ref>"[http://www.courts.state.ny.us/courts/10jd/suffolk/index.shtml 10th Judicial District: Suffolk County]".</ref><ref>"[http://www.courts.state.ny.us/courts/10jd/suffolk/structure.shtml Structure & Jurisdiction of the Courts]".</ref>  Similarly, the local courts hear claims of a limited dollar amount, or hear specific types of cases. The Federal Court has jurisdiction over Federal Claims, State Law claims that are joined with Federal claims, and claims where there is a diversity of citizenship.<ref>"[[Federal jurisdiction (United States)]]".</ref>

====Supreme Court====
* The Suffolk County [[New York Supreme Court|Supreme Court]] is a trial court of unlimited general original jurisdiction (except as to matters which the federal courts have exclusive jurisdiction), but it generally only hears cases that are outside the [[subject-matter jurisdiction]] of other trial courts of more limited jurisdiction. The Suffolk County Clerk is the Clerk of the Court of the Supreme Court.
* The main courthouse for the Supreme Court is in Riverhead, which has been the court's home since 1729. The original courthouse was replaced in 1855, and that courthouse was expanded in 1881.<ref>"[https://kreppein.blogspot.com/2009/03/suffolk-county-supreme-court.html The Suffolk County Supreme Court]".</ref> The courthouse was damaged by fire and rebuilt in 1929. In 1994, a new court building was added to the complex. This Courthouse was dedicated as the "Alan D. Oshrin Supreme Court Building" on August 1, 2011.<ref>"[http://www.longislandlegalnews.com/2011/08/suffolk-county-courthouse-gets-new-name.html Suffolk County Courthouse Gets New Name: Dedicated As The "Hon. Alan D. Oshrin Supreme Court Building"] {{Webarchive|url=https://web.archive.org/web/20120331021846/http://www.longislandlegalnews.com/2011/08/suffolk-county-courthouse-gets-new-name.html |date=March 31, 2012}}".</ref>
* The Supreme Court also shares space in the Cohalan Court Complex in [[Central Islip]]<ref name="courts.state.ny.us">"[http://www.courts.state.ny.us/courts/10jd/suffolk/directions.shtml Directions to the Suffolk County Courts]"</ref> with several other courts and county agencies. Matrimonial actions are heard in the Supreme Court, and those matters are generally heard in the Supreme Court section of the Cohalan Court Complex.

====Other Superior Courts====
* The Suffolk County Court is a trial court of limited jurisdiction. It has jurisdiction over all of Suffolk County, and is authorized to handle criminal prosecutions of both felonies and lesser offenses committed within the county, although in practice most minor offenses are handled by the local courts. It is the trial court for felonies, or where a person is indicted by a Grand Jury in Suffolk County. The County Court also has limited jurisdiction in civil cases, generally involving amounts up to $25,000. The County Court is in the Cromarty Court Complex Criminal Courts Building in Riverhead.
* The Suffolk County [[New York Surrogate's Court|Surrogate's Court]] hears cases involving the affairs of decedents, including the [[probate]] of wills and the administration of estates, guardianships, and adoptions. The Surrogate's Court is in the County Center in Riverhead.
* The Suffolk County Family Court has jurisdiction over all of Suffolk County in petitions filed for Neglect & Abuse, Juvenile Delinquency/Designated Felonies, Persons in Need of Supervision, Adoption, Guardianship, Foster Care, Family Offense (Order of Protection), Custody & Visitation, Paternity, Support Matters (Child & Spousal), Consent to Marry. The court also has a Juvenile Drug Court and Family Treatment Court. Individuals, attorneys, and agencies may initiate a proceeding in the Family Court with the filing of a petition. The Suffolk County Family Court is in the Cohalan Court Complex in [[Central Islip]]<ref name="courts.state.ny.us"/> and maintains a facility in Riverhead. Case assignment is dependent upon the geographical location of the parties.

====Local courts====
The District Court and the Town and Village Courts are the local courts of Suffolk County. There are more than 30 local courts, each with limited criminal and civil subject matter and geographic jurisdictions. The local criminal courts have trial jurisdiction over misdemeanors, violations and infractions; preliminary jurisdiction over felonies; and traffic tickets charging a crime. The local civil courts calendar small claims, evictions, and civil actions.
* Suffolk County District Court has geographic jurisdiction over the 5 western towns of Suffolk County (Babylon, Brookhaven, Huntington, Islip & Smithtown). The Criminal division of the Suffolk District Court is in the Cohalan Court Complex, Central Islip, and includes Domestic Violence Courts, Drug Court, and a Mental Health Court. The Civil division is divided up in the 5 "outlying" courthouses in Lindenhurst, Huntington Station, Hauppauge, Ronkonkoma, and Patchogue. Civil actions may be filed up to $15,000, and small claims actions up to $5000. Actions are commenced by filing with the court. Summary proceedings under the RPAPL are filed in the district where the property is located.
* The Town Courts of East Hampton, Riverhead, Shelter Island, Southampton, and Southold have geographic jurisdiction over the 5 eastern towns of Suffolk County. Each town maintains a courthouse where judges hear criminal cases (including a regional Drug Court) and civil actions. Civil actions are commenced by serving a summons and complaint for claims up to $3,000, and small claims actions are heard up to $3000. Summary proceedings under the RPAPL are filed in the town where the property is located.
* The Village Courts of Amityville, Asharoken, Babylon, Belle Terre, Bellport, Brightwaters, Head of the Harbor, Huntington Bay, Islandia, Lake Grove, Lindenhurst, Lloyd Harbor, Nissequogue, Northport, Ocean Beach, Old Field, Patchogue, Poquott, Port Jefferson, Quogue, Sag Harbor, Saltaire, Shoreham, Southampton, Village of the Branch, West Hampton Dunes, and Westhampton Beach have geographic jurisdiction within each incorporated village. Criminal and civil subject matter jurisdiction varies in each court.

Most non-criminal moving violation tickets issued in the five west towns are handled by the Traffic Violations Bureau, which is part of the [[New York State Department of Motor Vehicles]], not the court system.

==Economy==
{{See also|Economy of Long Island}}

==Education==
===Colleges and universities===
[[File:SUNY SB MaibAlley.JPG|thumb|Stony Brook University in Stony Brook]]
[[File:St Joseph's College Patchogue Campus.jpg|thumb|St. Joseph's University in Patchogue]]
* '''[[State University of New York]]'''
** [[Stony Brook University]] in [[Stony Brook, New York|Stony Brook]] with a [[Stony Brook Southampton|satellite campus]] in [[Southampton, New York|Southampton]]
** [[Farmingdale State College]] in [[East Farmingdale]]
** [[Suffolk County Community College]] in [[Selden, New York|Selden]], [[Riverhead, New York|Riverhead]], and [[Brentwood, New York|Brentwood]], satellite centers in [[Sayville]] and [[Riverhead, New York|Riverhead]]
* '''[[Private university|Private]]'''
** [[Five Towns College]] in [[Dix Hills]]
** [[St. Joseph's University (New York)|St. Joseph's University]] in [[Patchogue]]
** [[Touro University System]] with its School of Health Sciences in [[Central Islip]]<ref>{{cite web |title=Campus Locations & Contact |url=https://shs.touro.edu/about-us/our-campuses/ |website=The School of Health Sciences of Touro College |access-date=September 11, 2022}}</ref> and its [[Touro Law Center|Law Center]] in [[Central Islip]]
** [[Cold Spring Harbor Laboratory School of Biological Sciences]] in [[Cold Spring Harbor]]
* '''Satellite and branch campuses'''
** [[Adelphi University]] in [[Hauppauge]]<ref>{{cite web |title=Adelphi University Suffolk Center |url=https://suffolk.adelphi.edu/ |website=Adelphi University |access-date=November 9, 2019}}</ref>
** [[Long Island University]] in [[Brentwood, New York|Brentwood]]<ref>{{cite web |title=Brentwood Long Island University |url=https://liu.edu/Brentwood |website=Long Island University |access-date=November 9, 2019}}</ref> and [[Riverhead, New York|Riverhead]],<ref>{{cite web |title=Riverhead Long Island University |url=https://liu.edu/Riverhead |website=Long Island University |access-date=November 9, 2019}}</ref> on the campuses of Suffolk County Community College
** [[Molloy University]] in [[Amityville]]<ref>{{cite web |title=Suffolk Center |url=https://www.molloy.edu/about-molloy-university/suffolk-center |website=Molloy University |access-date=September 11, 2022}}</ref>

===School districts===
School districts (all officially designated for grades K-12) include:<ref>{{cite map|author=Geography Division|url=https://www2.census.gov/geo/maps/DC2020/PL20/st36_ny/schooldistrict_maps/c36103_suffolk/DC20SD_C36103.pdf|title=2020 census - school district reference map: Suffolk County, NY|publisher=[[U.S. Census Bureau]]|date=January 12, 2021|access-date=July 21, 2022}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st36_ny/schooldistrict_maps/c36103_suffolk/DC20SD_C36103_SD2MS.txt Text list]</ref>

{{Div col|colwidth=30em}}
* [[Amagansett Union Free School District]]
* [[Amityville Union Free School District]]
* [[Babylon Union Free School District]]
* [[Bay Shore Union Free School District]]
* [[Bayport-Blue Point School District]]
* [[Brentwood Union Free School District]]
* [[Bridgehampton Union Free School District]]
* [[Comsewogue School District]]
* [[Center Moriches Union Free School District]]
* [[Central Islip Union Free School District]]
* [[Cold Spring Harbor Central School District]]
* [[Commack Union Free School District]]
* [[Connetquot Central School District]]
* [[Copiague Union Free School District]]
* [[Deer Park School District (New York)|Deer Park Union Free School District]]
* [[East Hampton Union Free School District]]
* [[East Islip Union Free School District]]
* [[East Moriches Union Free School District]]
* [[East Quogue Union Free School District]]
* [[Eastport-South Manor Central School District]]
* [[Elwood Union Free School District]]
* [[Farmingdale Union Free School District]]
* [[Fire Island Union Free School District]] (Only operates elementary school)
* [[Fishers Island Union Free School District]]
* [[Greenport Union Free School District]]
* [[Half Hollow Hills Central School District]]
* [[Hampton Bays Union Free School District]]
* [[Harborfields Central School District]]
* [[Hauppauge Union Free School District]]
* [[Huntington Union Free School District]]
* [[Islip Union Free School District]]
* [[Kings Park Central School District]]
* [[Lindenhurst Union Free School District]]
* [[Middle Country Central School District]]
* [[Longwood Central School District]]
* [[Mattituck-Cutchogue Union Free School District]]
* [[Miller Place Union Free School District]]
* [[Montauk Union Free School District]]
* [[Mount Sinai School District]]
* [[New Suffolk Common School District]]
* [[North Babylon Union Free School District]]
* [[Northport-East Northport Union Free School District]]
* [[Oysterponds Union Free School District]]
* [[Patchogue-Medford School District]]
* [[Port Jefferson Union Free School District]]
* [[Quogue Union Free School District]]
* [[Remsenburg-Speonk Union Free School District]]
* [[Riverhead Central School District]]
* [[Rocky Point Union Free School District]]
* [[Sachem Central School District]]
* [[Sag Harbor Union Free School District]]
* [[Sagaponack Common School District]]
* [[Sayville School District]]
* [[Shelter Island Union Free School District]]
* [[Shoreham-Wading River Central School District]]
* [[Smithtown Central School District]]
* [[South Country Central School District]]
* [[South Huntington Union Free School District]]
* [[Southampton Union Free School District]]
* [[Southold Union Free School District]]
* [[Springs Union Free School District]]
* [[Three Village Central School District]]
* [[Tuckahoe Common School District]]
* [[Wainscott Common School District]]
* [[West Babylon Union Free School District]]
* [[West Islip Union Free School District]]
* [[Westhampton Beach Union Free School District]]
* [[William Floyd Union Free School District]]
* [[Wyandanch Union Free School District]]
{{Div col end}}

==Media==
===Newspapers===
{{Div col|colwidth=18em}}
* ''Amityville Record''
* ''Bayport-Blue Point Gazette''
* ''[[Dan's Papers]]''
* ''Fire Island News''
* ''[[Newsday]]''
* ''Sayville Gazette''
* ''Shelter Island Reporter''
* ''The Beacon''
* ''The Brookhaven Messenger''
* ''The East Hampton Press''
* ''[[The East Hampton Star]]''
* ''The Islip Bulletin''
* ''The Islip Messenger''
* ''The Long Island Advance''
* ''The Long–Islander''
* ''[[The Times Beacon Record|The Port Times Record]]''
* ''The Riverhead News-Review''
* ''The Shelter Island Reporter''
* ''The Smithtown Messenger''
* ''The Southampton Press''
* ''The Suffolk County News''
* ''The Suffolk Times''
* ''The Tide of Moriches and Manorville''
* ''[[The Times Beacon Record]]''
* ''[[The Times Beacon Record|The Times of Huntington]]''
* ''[[The Times Beacon Record|The Times of Middle Country]]''
* ''[[The Times Beacon Record|The Times of Northport and East Northport]]''
* ''[[The Times Beacon Record|The Times of Smithtown]]''
* ''[[The Times Beacon Record|The Village Beacon Record]]''
* ''[[The Times Beacon Record|The Village Times Herald]]''
{{Div col end}}

===Radio stations===
{{Div col|colwidth=12em}}
* [[WALK-FM]], [[Patchogue]]
* [[WAPP-LP]], [[Westhampton, New York|Westhampton]]
* [[WBAB]], [[Babylon (village), New York|Babylon]]
* [[WBAZ]], [[Bridgehampton]]
* [[WBEA]], [[Southold (CDP), New York|Southold]]
* [[WBLI]], Patchogue
* [[WBWD (AM)|WBWD]], [[Islip (hamlet), New York|Islip]]
* [[WBZO (FM)|WBZO]], Westhampton
* [[WDRE (AM)|WDRE]], [[Riverhead (CDP), New York|Riverhead]]
* [[WEER (FM)|WEER]], [[Montauk, New York|Montauk]]
* [[WEGB]], [[Napeague]]
* WEGQ, [[Quogue]]
* [[WEHM]], [[Manorville, New York|Manorville]]
* WEHN, [[East Hampton (village), New York|East Hampton]]
* [[WELJ]], Montauk
* [[WFRS]], [[Smithtown (CDP), New York|Smithtown]]
* [[WGSS (FM)|WGSS]], [[Copiague]]
* [[WHFM]], [[Southampton (village), New York|Southampton]]
* [[WJJF]], Montauk
* [[WJVC]], [[Center Moriches]]
* [[WLID]], Patchogue
* [[WLIM]], [[Medford, New York|Medford]]
* [[WLIR-FM]], [[Hampton Bays]]
* [[WLIW-FM]], Southampton
* [[WLIX-LP]], [[Ridge, New York|Ridge]]
* [[WLNG]], [[Sag Harbor]]
* [[WNYG]], Patchogue
* [[WNYH]], [[Huntington (CDP), New York|Huntington]]
* [[WPLF]], [[Shelter Island (CDP), New York|Shelter Island]]
* [[WPTY]], [[Calverton, New York|Calverton]]-[[Riverhead (town), New York#Other communities|Roanoke]]
* [[WRCN-FM]], Riverhead
* [[WRIV]], Riverhead
* [[WRLI]], Southampton
* [[WSHR]], [[Lake Ronkonkoma]]
* [[WSUF]], [[Noyack]]
* [[WUSB (FM)|WUSB]], [[Stony Brook, New York|Stony Brook]]
* [[WWSK]], Smithtown
* [[WWWF-FM]], [[Bay Shore]]
* [[WXBA]], [[Brentwood, New York|Brentwood]]
{{Div col end}}

===Television stations===
* [[WFTY-DT]], Smithtown
* [[WLNY-TV]], Riverhead
* [[WVVH-CD]], Southampton

==Suffolk seashore==
{{See also|Outer Barrier Islands}}
[[Fire Island Lighthouse]] was an important landmark for many trans-Atlantic ships coming into [[New York Harbor]] in the early 20th century. For many European immigrants, the Fire Island Light was their first sight of land upon arrival in America.

The [[Fire Island Inlet]] span of the [[Robert Moses Causeway]] connects to [[Robert Moses State Park]] on the western tip of Fire Island.

The [[Great South Bay Bridge]], the first causeway bridge, had only one northbound and one southbound lane, was opened to traffic in April 1954. The span of {{convert|2|mi|km|0}} across Great South Bay to Captree Island features a main span of {{convert|600|ft|m|sigfig=1}}, with a clearance for boats of {{convert|60|ft|m|sigfig=1}}.

After crossing the State Boat Channel over its {{convert|665|ft|m|adj=mid|-long}} [[State Boat Channel Bridge|bascule bridge]], the causeway meets the Ocean Parkway at a cloverleaf interchange. This interchange provides access to [[Captree State Park]], [[Gilgo State Park]] and [[Jones Beach State Park]].

The [[Fire Island Inlet Bridge]] continues the two-lane road, one lane in each direction, across Fire Island Inlet to its terminus at [[Robert Moses State Park]] and The Fire Island Lighthouse. Robert Moses Causeway opened in 1964.

Suffolk County has the most [[lighthouses]] of any United States county, with 15 of its original 26 lighthouses still standing. Of these 15, eight are in [[Southold, New York|Southold]] township alone, giving it more lighthouses than any other township in the United States.

<gallery mode="packed" heights="160">
File:Oak-beach-regatta-1.jpg|[[West Gilgo Beach, New York]] - [[Oak Beach]]
File:Eatons Neck Light.JPG|[[Huntington Bay, New York]]
File:Fire island lighthouse.jpg|[[Fire Island Lighthouse]]
File:F I W SEASHORE.jpg|[[Fire Island National Seashore]]
File:MONTAUK POINT LIGHT 1 150 500.jpg|[[Montauk Lighthouse]], a Suffolk County landmark pictured in 1997
</gallery>

==Secessionist movements==
{{Main|Peconic County, New York}}
At various times, there have been proposals for a division of Suffolk County into two counties. The western portion would be called Suffolk County, while the eastern portion of the current Suffolk County would comprise a new county to be called [[Peconic County]]. Peconic County would consist of the five easternmost [[Political subdivisions of New York#Town|towns]] of Suffolk County: [[East Hampton (town), New York|East Hampton]], [[Riverhead (town), New York|Riverhead]], [[Shelter Island (town), New York|Shelter Island]], [[Southampton, New York|Southampton]] and [[Southold, New York|Southold]], plus the [[Shinnecock Indian Reservation]].

The proposed Peconic County flag showed the two forks at the east end of Long Island separated by Peconic Bay. The star on the north represents Southold. The stars on the South Fork represent Southampton and East Hampton. Riverhead is at the fork mouth and Shelter Island is between the forks.

The secessionist movement has not been active since 1998.

''The End of the Hamptons: Scenes from the Class Struggle in America's Paradise'', by [[Corey Dolgon]] (New York University Press, 2005<ref>{{Cite web|url=https://nyupress.org/|archive-url=https://web.archive.org/web/20130120124846/http://nyupress.org/books/book-details.aspx?bookid=9369#.UOGljKzAkY4|title=Homepage|archive-date=January 20, 2013|website=NYU Press}}</ref>) examined the class roots of the secessionist movement in the Hamptons. In his review, [[Howard Zinn]] wrote that the book "[t]akes us beyond the much-romanticized beaches of Long Island to the rich entrepreneurs and their McMansions, the Latino workers, and the stubborn indigenous residents refusing to disappear. The book is important because it is in so many ways a microcosm of the nation."<ref>{{Cite web|url=http://www.easternct.edu/~russellj/ProgressiveWritersCooperativeandSpeakersBureau.htm|archive-url=https://web.archive.org/web/20100527183511/http://www.easternct.edu/~russellj/ProgressiveWritersCooperativeandSpeakersBureau.htm|title=Progressive Writers Cooperative and Speakers Bureau|archive-date=May 27, 2010}}</ref> The book won the Association for Humanist Sociology's 2005 Book Prize and the American Sociological Association's Marxist Section Book Award in 2007.

Matt DeSimone, a young adult from Southold, and his partner Jake Dominy unsuccessfully started a similar movement in the late 2010s.

==Finance and taxation==
Suffolk County has an 8.625% sales tax, compared to an overall New York State sales tax of 4%, consisting of an additional 4.25% on top of the state and [[Metropolitan Transportation Authority|MTA]] assessment of .375%<ref>{{Cite web|url=http://suffolkcountyny.gov/comptroller/DidYouKnow.aspx|title=Suffolk County Comptroller's Office|access-date=September 6, 2013|archive-date=August 6, 2013|archive-url=https://web.archive.org/web/20130806233058/http://suffolkcountyny.gov/comptroller/DidYouKnow.aspx|url-status=dead}}</ref>

== Health ==
In March 2020, the [[COVID-19 pandemic in the United States|COVID-19 pandemic]] first affected the county. As of December 12, 2020, there have been a total of 73,281 cases and 2,153 deaths from the virus.<ref>{{Cite web|title=COVID-19 CASE UPDATE - December 12, 2020, 4:30 p.m.|url=https://suffolkcountyny.gov/Departments/Health-Services/Health-Bulletins/Novel-Coronavirus/covid-19-case-update-december-12-2020-430-pm|access-date=December 13, 2020|website=Suffolk County Government|language=en-US}}</ref>

==Hospitals==
Tertiary care hospitals:
* [[Good Samaritan University Hospital]]
* [[South Shore University Hospital]]
* [[Stony Brook University Hospital]]

Community hospitals:
* [[Huntington Hospital (New York)|Huntington Hospital]]
* [[Mather Hospital]]
* [[NYU Langone Hospital — Suffolk]]
* [[Northwell Health|Peconic Bay Medical Center]]
* [[Stony Brook University Hospital|Stony Brook Eastern Long Island Hospital]]
* [[Stony Brook Southampton Hospital]]
* [[Roman Catholic Diocese of Rockville Centre#Catholic Health|St. Charles Hospital]]
* [[Saint Catherine of Siena Medical Center]]

Specialty care hospitals:
* [[Northwell Health|South Oaks Hospital]]
* [[Stony Brook University Hospital#Stony Brook Children's Hospital|Stony Brook Children's Hospital]]

==Communities==
{{Main|List of municipalities on Long Island}}
[[File:Suffolk County, NY, towns and villages.svg|thumb|Municipalities of Suffolk County]]
[[File:Suffolk County Municipalities Map.jpg|alt=A map outlining the villages (grey), hamlets, and CDPs of Suffolk County.|thumb|A map outlining the villages (grey), hamlets, and CDPs of Suffolk County]]

In the [[State of New York]], a [[Administrative divisions of New York (state)#Town|town]] is the major subdivision of each county. Towns provide or arrange for most municipal services for residents of hamlets and selected services for residents of villages. All residents of New York who do not live in a [[Administrative divisions of New York (state)#City|city]] or on an [[Indian reservation]] live in a town. A [[Administrative divisions of New York (state)#Village|village]] is an [[incorporated area]] which is usually, but not always, within a single town. A village is a clearly defined municipality that provides the services closest to the residents, such as garbage collection, street and highway maintenance, street lighting and building codes. Some villages provide their own police and other optional services. A [[Administrative divisions of New York (state)#Hamlet|hamlet]] is an informally defined populated area within a town that is not part of a village.

Figures in parentheses are 2022 population estimates from the Census Bureau.<ref>{{cite web |title=City and Town Population Totals: 2020-2022 |url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-total-cities-and-towns.html |access-date=June 20, 2023 |website=Census.gov}}</ref>

===Towns===
{{Div col}}
* [[Babylon, New York|Babylon]] (217,656)
* [[Brookhaven, New York|Brookhaven]] (488,497)
* [[East Hampton (town), New York|East Hampton]] (28,607)
* [[Huntington, New York|Huntington]] (203,243)
* [[Islip, New York|Islip]] (337,922)
* [[Riverhead (town), New York|Riverhead]] (35,834)
* [[Shelter Island, New York|Shelter Island]] (3,276)
* [[Smithtown, New York|Smithtown]] (115,768)
* [[Southampton, New York|Southampton]] (69,490)
* [[Southold, New York|Southold]] (23,912)
{{Div col end}}

===Villages (incorporated)===
{{Div col|colwidth=12em}}
* [[Amityville]] (9,573)
* [[Asharoken]] (603)
* [[Babylon (village), New York|Babylon]] (12,146)
* [[Belle Terre]] (782)
* [[Bellport]] (2,197)
* [[Brightwaters, New York|Brightwaters]] (3,170)
* [[Dering Harbor]] (36)
* [[East Hampton (village), New York|East Hampton]] (1,531)
* [[Greenport, Suffolk County, New York|Greenport]] (2,583)
* [[Head of the Harbor]] (1,481)
* [[Huntington Bay]] (1,427)
* [[Islandia, New York|Islandia]] (3,568)
* [[Lake Grove, New York|Lake Grove]] (11,041)
* [[Lindenhurst, New York|Lindenhurst]] (27,064)
* [[Lloyd Harbor]] (3,551)
* [[Nissequogue]] (1,603)
* [[North Haven, New York|North Haven]] (1,161)
* [[Northport, New York|Northport]] (7,300)
* [[Ocean Beach, New York|Ocean Beach]] (171)
* [[Old Field, New York|Old Field]] (906)
* [[Patchogue]] (12,344)
* [[Poquott]] (925)
* [[Port Jefferson]] (8,059)
* [[Quogue]] (1,687)
* [[Sag Harbor]] (2,785)
* [[Sagaponack]] (736)
* [[Saltaire, New York|Saltaire]] (110)
* [[Shoreham, New York|Shoreham]] (521)
* [[Southampton (village), New York|Southampton]] (4,615)
* [[Village of the Branch]] (1,759)
* [[Westhampton Beach]] (2,183)
* [[West Hampton Dunes]] (115)
{{Div col end}}

===Census-designated places (unincorporated)===
{{Div col|colwidth=12em}}
* [[Amagansett]]
* [[Aquebogue]]
* [[Baiting Hollow, New York|Baiting Hollow]]
* [[Bay Shore]]
* [[Bayport, New York|Bayport]]
* [[Baywood, New York|Baywood]]
* [[Blue Point, New York|Blue Point]]
* [[Bohemia, New York|Bohemia]]
* [[Brentwood, New York|Brentwood]]
* [[Bridgehampton]]
* [[Brookhaven (CDP), New York|Brookhaven]]
* [[Calverton, New York|Calverton]]
* [[Captree, New York|Captree]]
* [[Center Moriches]]
* [[Centereach]]
* [[Centerport, New York|Centerport]]
* [[Central Islip]]
* [[Cold Spring Harbor]]
* [[Commack]]
* [[Copiague]]
* [[Coram, New York|Coram]]
* [[Cutchogue]]
* [[Deer Park, New York|Deer Park]]
* [[Dix Hills]]
* [[East Farmingdale]]
* [[East Hampton North, New York|East Hampton North]]
* [[East Islip]]
* [[East Marion]]
* [[East Moriches]]
* [[East Northport]]
* [[East Patchogue]]
* [[East Quogue]]
* [[East Setauket]]
* [[East Shoreham]]
* [[Eastport, New York|Eastport]]
* [[Eatons Neck]]
* [[Elwood, New York|Elwood]]
* [[Farmingville]]
* [[Fire Island]]
* [[Fishers Island]]
* [[Flanders, New York|Flanders]]
* [[Fort Salonga, New York|Fort Salonga]]
* [[Gilgo, New York|Gilgo]]
* [[Gordon Heights]]
* [[Great River, New York|Great River]]
* [[Greenlawn, New York|Greenlawn]]
* [[Greenport West]]
* [[Halesite]]
* [[Hampton Bays]]
* [[Hauppauge]]
* [[Holbrook, New York|Holbrook]]
* [[Holtsville]]
* [[Huntington (CDP), New York|Huntington]]
* [[Huntington Station, New York|Huntington Station]]
* [[Islip (hamlet), New York|Islip]]
* [[Islip Terrace]]
* [[Jamesport, New York|Jamesport]]
* [[Kings Park, New York|Kings Park]]
* [[Lake Ronkonkoma]]
* [[Laurel, New York|Laurel]]
* [[Manorville, New York|Manorville]]
* [[Mastic, New York|Mastic]]
* [[Mastic Beach]]
* [[Mattituck]]
* [[Medford, New York|Medford]]
* [[Melville, New York|Melville]]
* [[Middle Island, New York|Middle Island]]
* [[Miller Place]]
* [[Montauk, New York|Montauk]]
* [[Moriches, New York|Moriches]]
* [[Mount Sinai, New York|Mount Sinai]]
* [[Napeague]]
* [[Nesconset]]
* [[New Suffolk]]
* [[North Amityville]]
* [[North Babylon]]
* [[North Bay Shore]]
* [[North Bellport]]
* [[North Great River]]
* [[North Lindenhurst]]
* [[North Patchogue]]
* [[North Sea, New York|North Sea]]
* [[Northampton, Suffolk County, New York|Northampton]]
* [[Northville, Suffolk County, New York|Northville]]
* [[Northwest Harbor, New York|Northwest Harbor]]
* [[Noyack]]
* [[Oak Beach]]
* [[Oakdale, New York|Oakdale]]
* [[Orient, New York|Orient]]
* [[Peconic, New York|Peconic]]
* [[Port Jefferson Station]]
* [[Quiogue]]
* [[Remsenburg-Speonk]]
* [[Ridge, New York|Ridge]]
* [[Riverhead (CDP), New York|Riverhead]]
* [[Riverside, Suffolk County, New York|Riverside]]
* [[Rocky Point, New York|Rocky Point]]
* [[Ronkonkoma, New York|Ronkonkoma]]
* [[Sayville]]
* [[Selden, New York|Selden]]
* [[Setauket]]
* [[Shelter Island (CDP), New York|Shelter Island]]
* [[Shelter Island Heights]]
* [[Shinnecock Hills, New York|Shinnecock Hills]]
* [[Shirley, New York|Shirley]]
* [[Smithtown (CDP), New York|Smithtown]]
* [[Sound Beach]]
* [[South Huntington]]
* [[Southold (CDP), New York|Southold]]
* [[Springs, New York|Springs]]
* [[St. James, New York|St. James]]
* [[Stony Brook, New York|Stony Brook]]
* [[Stony Brook University]]
* [[Terryville, New York|Terryville]]
* [[Tuckahoe, Suffolk County, New York|Tuckahoe]]
* [[Wading River, New York|Wading River]]
* [[Wainscott, New York|Wainscott]]
* [[Water Mill, New York|Water Mill]]
* [[West Babylon]]
* [[West Bay Shore]]
* [[West Hills, New York|West Hills]]
* [[West Islip]]
* [[West Sayville]]
* [[Westhampton, New York|Westhampton]]
* [[Wheatley Heights]]
* [[Wyandanch]]
* [[Yaphank]]
{{Div col end}}

<gallery mode="packed" heights="160">
File:Riverhead, New York.jpg|[[Riverhead, New York]]
File:Watermill-convent.jpg|[[Watermill, New York]]
</gallery>

[[File:Gardiners island 2007.jpg|thumb|[[Gardiners Island]] in Suffolk County]]

===Gardiners Island===
{{Main|Gardiners Island}}
Gardiners Island is an island off eastern Suffolk County. The Island is {{convert|6|mi|km|0}} long, and {{convert|3|mi|km|0}} wide and has {{convert|27|mi|km|0}} of coastline. The same family has owned the Island for nearly 400 years; one of the largest privately owned islands in America or the world. In addition, it is the only American real estate still intact as part of an original royal grant from the English Crown.

===Robins Island===
{{Main|Robins Island}}

Robins Island is an Island in the [[Peconic Bay]] between the North and South folks of eastern Suffolk County. It is within the jurisdiction of Town of Southold in Suffolk County, New York. The Island is {{convert|435|acre|km2|sigfig=2}} and presently undeveloped. The island is privately owned and not accessible to the public.

===Indian reservations===
Two [[Indian reservation]]s are within the borders of Suffolk County:
* [[Shinnecock Reservation]]
* [[Poospatuck Reservation]]

==Transportation==
The county includes a lot of roadways and other public transportation infrastructure. The local [[Suffolk County Legislature]] oversees funding and regulations for the infrastructure.<ref name=":0" /> In 2019, the legislature required all new projects to account for future [[climate change]] caused [[sea level rise]].<ref name=":0" />

===Major highways===
* [[Interstate 495 (New York)|I-495]] (Long Island Expressway) traverses the county from the [[Nassau County, New York|Nassau County]] line in the West to [[Riverhead (town), New York|Riverhead]] in the East. Original plans called for the Expressway to extend further past Riverhead and along the island's North Fork, possibly to Orient Point, where a crossing to Connecticut could be built. The expressway connects to Manhattan via the [[Queens-Midtown Tunnel]].<ref>{{Cite web|url=http://www.interstate-guide.com/i-495-ny/|title=Interstate 495 New York|website=Interstate-Guide.com}}</ref>
* [[New York State Route 27]] crosses the county from the [[Nassau County, New York|Nassau County]] line in the West to [[Montauk Point]] in the East, which is also the easternmost point in the State of New York. The road is limited-access from [[West Babylon]] to [[Southampton, New York|Southampton]].

===Airports===
Commercial airport:
* [[Long Island MacArthur Airport|Long Island MacArthur Airport (ISP/KISP)]]

General aviation airports:
* [[Republic Airport|Republic Airport (FRG/KFRG)]]
* [[Brookhaven Airport|Brookhaven Calabro Airport (WSH/KHWV/HWV)]]
* [[Francis S. Gabreski Airport|Francis S. Gabreski Airport (FOK/KFOK)]]
* [[East Hampton Airport|Town of East Hampton Airport (JPX/KJPX)]]
* [[Elizabeth Field (Suffolk County, New York)|Elizabeth Field (Fisher's Island) (FID/0B8)]]

===Public transportation===
Suffolk County is served by [[Suffolk County Transit]]. [[Long Island Rail Road]], the [[Hampton Jitney]], and [[Hampton Luxury Liner]] connect Suffolk County to New York City. Some parts of Suffolk County are also served by [[Nassau Inter-County Express|NICE bus]].

==Notable people==
* [[Craig Biggio]]
* [[Jimmy Buffett]]                                                                                                                                   
* [[Mariah Carey]]
* [[Mick Foley]]
* [[Kevin James]]
* [[Loudon Wainwright III]]
* [[Carl Yastrzemski]]

==See also==
* [[List of counties in New York]]
* [[National Register of Historic Places listings in Suffolk County, New York]]
* [[Suffolk County, Farmland Development Rights]]
* {{USS|Suffolk County|LST-1173}}

==References==
{{reflist}}

== Bibliography ==
{{refbegin|100em|indent=yes}}
* {{cite book |date=1896 |title=Portrait and Biological Record of Suffolk County (Long Island) New York – Containing Portraits and Biographical Sketches of Prominent and Representative Citizens of the County – Together with Biographies and Portraits of All the Presidents of the United States |url=https://books.google.com/books?id=t_5HAQAAMAAJ&pg=PA9 |publisher=Chapman Publishing Company |access-date=October 10, 2021 |lccn=01014266  |oclc=35905707|via=Google Books (New York Public Library)}}
{{refend}}

==External links==
{{Wikivoyage|Suffolk County (New York)|Suffolk County}}
* [https://web.archive.org/web/20121005032801/http://www.longislandexchange.com/suffolk-county.html Long Island History: Suffolk County]
* [https://web.archive.org/web/20070306001205/http://www.co.suffolk.ny.us/police/index.htm Suffolk County Police]
* [https://web.archive.org/web/20110429205426/http://www.live-brary.com/historical-newspapers Suffolk Historical Newspapers]
* [https://web.archive.org/web/20130120124924/http://www.suffolkcountyny.gov/Portals/0/planning/Cartography/NewLayout/CDPs2000.pdf Map of Suffolk County CDPs in 2000]
* [https://web.archive.org/web/20130120124852/http://www.suffolkcountyny.gov/Portals/0/planning/Cartography/NewLayout/CDPs2010.pdf Map of Suffolk County CDPs in 2010]

{{Geographic location
|Centre    = Suffolk County, New York
|North     = [[New Haven County, Connecticut]]<br />[[Long Island Sound]]
|Northeast = [[Middlesex County, Connecticut]] / [[New London County, Connecticut]]<br />[[Block Island Sound]]
|East      = Atlantic Ocean
|Southeast = Atlantic Ocean
|South     = Atlantic Ocean
|Southwest = Atlantic Ocean
|West      = [[Nassau County, New York|Nassau County]]
|Northwest = [[Fairfield County, Connecticut]]<br />[[Long Island Sound]]
}}
{{Long Island region}}
{{Suffolk County, New York}}
{{New York}}
{{New York metropolitan area}}
{{Authority control}}

[[Category:Suffolk County, New York| ]]
[[Category:1683 establishments in the Province of New York]]
[[Category:Counties in the New York metropolitan area]]
[[Category:Long Island Sound]]
[[Category:Long Island]]
[[Category:Populated places established in 1683]]