County statistics of the United States

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Template:Short description In 45 of the 50 states of the United States, the county is used for the level of local government immediately below the state itself. Louisiana uses parishes, and Alaska uses boroughs. In Connecticut, Massachusetts, and Rhode Island, some or all counties within states have no governments of their own; the counties continue to exist as legal entities, however, and are used by states for some administrative functions and by the United States Census bureau for statistical analysis. There are 3,242 counties and county equivalent administrative units in total, including the District of Columbia and 100 county-equivalents in the U.S. territories.

There are 41 independent cities in the United States. In Virginia, any municipality that is incorporated as a city legally becomes independent of any county. Where indicated, the statistics below do not include Virginia's 38 independent cities.

In Alaska, most of the land area of the state has no county-level government. Those parts of the state are divided by the United States Census Bureau into census areas, which are not the same as boroughs. The state's largest statistical division by area is the Yukon–Koyukuk Census Area, which is larger than any of the state's boroughs. Although Anchorage is called a municipality, it is considered a consolidated city and borough.

There are 100 county-equivalents in the territories of the United States: they are the 3 districts and 2 atolls of American Samoa, all of Guam (Guam as one single county-equivalent), the 4 municipalities in the Northern Mariana Islands, the 78 municipalities of Puerto Rico, the 3 main islands of the U.S. Virgin Islands, and the 9 islands in the U.S. Minor Outlying Islands.<ref>https://www.census.gov/geo/reference/codes/cou.html ‘’2010 FIPS Codes for Counties and County Equivalent Entities.’’ Census.gov. Retrieved June 2019.</ref><ref name="June_2019">https://www2.census.gov/geo/pdfs/reference/GARM/Ch4GARM.pdf ‘’States, Counties, and Statistically Equivalent Entities (Chapter 4).’’ Census.gov. Retrieved July 6, 2018.</ref><ref>https://web.archive.org/web/20151018122108/http://www.census.gov/geo/reference/ansi_statetables.html FIPS State Codes for the Outlying Areas of the United States and the Freely Associated States. [info about USMOI] (archived). U.S. Census Bureau. Retrieved June 2019.</ref> All of these territorial county-equivalents are defined by the U.S. Census Bureau.

Count

This is the number of counties and county-equivalents for each state, the District of Columbia, the 5 inhabited territories of the United States, and the U.S. Minor Outlying Islands.

Texas has 254 counties, the most of any state
Delaware has three counties, the fewest of any state

Lists of counties and county equivalents by number per political division:

Count State,
federal district
or territory 		Notes
254 Template:Flagicon Texas The most counties of any U.S. state
159 Template:Flagicon Georgia
133 Template:Flagicon Virginia 95 counties and 38 independent cities
120 Template:Flagicon Kentucky
115 Template:Flagicon Missouri 114 counties and 1 independent city
105 Template:Flagicon Kansas
102 Template:Flagicon Illinois
100 Template:Flagicon North Carolina
99 Template:Flagicon Iowa
95 Template:Flagicon Tennessee
93 Template:Flagicon Nebraska
92 Template:Flagicon Indiana
88 Template:Flagicon Ohio
87 Template:Flagicon Minnesota
83 Template:Flagicon Michigan
82 Template:Flagicon Mississippi
78 Template:Flagicon Puerto Rico Puerto Rico has no counties. The 78 municipalities of Puerto Rico are counted as county-equivalents by the U.S. Census Bureau
77 Template:Flagicon Oklahoma
75 Template:Flagicon Arkansas
72 Template:Flagicon Wisconsin
67 Template:Flagicon Alabama
67 Template:Flagicon Florida
67 Template:Flagicon Pennsylvania
66 Template:Flagicon South Dakota
64 Template:Flagicon Colorado
64 Template:Flagicon Louisiana Louisiana has no counties. The 64 parishes of Louisiana are counted as county-equivalents by the U.S. Census Bureau
62 Template:Flagicon New York New York City is a sui generis jurisdiction, in which the city government consists of 5 boroughs each coterminous with a county of the State of New York
58 Template:Flagicon California
56 Template:Flagicon Montana
55 Template:Flagicon West Virginia
53 Template:Flagicon North Dakota
46 Template:Flagicon South Carolina
44 Template:Flagicon Idaho
39 Template:Flagicon Washington
36 Template:Flagicon Oregon
33 Template:Flagicon New Mexico
30 Template:Flagicon Alaska Alaska has no counties. The following areas in Alaska are counted as county-equivalents: the 19 organized boroughs and, in its Unorganized Borough, 11 designated census areas
29 Template:Flagicon Utah
24 Template:Flagicon Maryland 23 counties and 1 independent city
23 Template:Flagicon Wyoming
21 Template:Flagicon New Jersey
17 Template:Flagicon Nevada 16 counties and 1 independent city
16 Template:Flagicon Maine
15 Template:Flagicon Arizona
14 Template:Flagicon Massachusetts 8 of the 14 counties in Massachusetts were disincorporated in the 1990s and early 2000s; local government in these areas consists of cities and towns. One of the remaining 6 counties is a consolidated town-county
14 Template:Flagicon Vermont
10 Template:Flagicon New Hampshire
9 Template:Flagicon U.S. Minor Outlying Islands The U.S. Minor Outlying Islands does not have counties. The 9 islands in the U.S. Minor Outlying Islands are counted as county-equivalents by the U.S. Census Bureau
9 Template:Flagicon Connecticut The U.S. Census Bureau uses Connecticut's nine planning regions instead of its eight historic counties for statistical purposes.
5 Template:Flagicon American Samoa The 3 districts and 2 unorganized atolls of American Samoa are counted as county-equivalents by the U.S. Census Bureau. American Samoa locally has 14 "counties", but these "counties" are not counted as counties by the U.S. Census Bureau (they are treated as "minor civil divisions")<ref name="June_2019"/>
5 Template:Flagicon Hawaii
5 Template:Flagicon Rhode Island Counties in Rhode Island have no governmental functions; local government is provided by eight cities and thirty-one towns
4 Template:Flagicon Northern Mariana Islands The Northern Mariana Islands has no counties. The 4 municipalities of the Northern Mariana Islands are counted as county-equivalents by the U.S. Census Bureau
3 Template:Flagicon Delaware The fewest counties of any U.S. state
3 Template:Flagicon Virgin Islands (U.S.) The U.S. Virgin Islands has no counties. The 3 main islands of the U.S. Virgin Islands are counted as county-equivalents by the U.S. Census Bureau
1 Template:Flagicon District of Columbia The District of Columbia has no counties; the District of Columbia is considered both a state-equivalent and a county equivalent for statistical purposes<ref>Template:Cite book</ref>
1 Template:Flagicon Guam Guam has no counties; Guam is considered both a state-equivalent and a county-equivalent for statistical purposes by the U.S. Census Bureau (similar to the District of Columbia)<ref name="June_2019"/>
  • Total (50 states and District of Columbia): 3,143 (3,007 counties and 136 county equivalents)
  • Total (50 states, District of Columbia and territories): 3,243 (3,007 counties and 236 county equivalents)
  • Average number of counties per state (not including D.C. and the territories): 62.84Template:Refn
  • Average number of counties per state (including D.C. and the territories): 56.8947368421Template:Refn

Population

Nationwide population extremes

Template:Main

These rankings include county equivalents.

Largest population counties nationwide
(2021 Census estimate)<ref name="USCensus2021Est">Template:Cite web</ref>
Rank County Population
1 Los Angeles County, California 9,829,544
2 Cook County, Illinois 5,173,146
3 Harris County, Texas 4,728,030
4 Maricopa County, Arizona 4,496,588
5 San Diego County, California 3,286,069
6 Orange County, California 3,167,809
7 Miami-Dade County, Florida 2,662,777
8 Kings County, New York 2,641,052
9 Dallas County, Texas 2,586,050
10 Riverside County, California 2,458,395
11 Queens County, New York 2,331,143
12 Clark County, Nevada 2,292,476
Smallest population counties in the 50 states and District of Columbia
(2021 Census estimate)<ref name="USCensus2021Est"/>
Rank County Population
1 Loving County, Texas 57
2 Kalawao County, Hawaii 82
3 King County, Texas 258
4 Kenedy County, Texas 340
5 McPherson County, Nebraska 379
6 Arthur County, Nebraska 439
7 Blaine County, Nebraska 461
8 Petroleum County, Montana 519
9 Grant County, Nebraska 579
10 Loup County, Nebraska 604
11 McMullen County, Texas 608
12 Borden County, Texas 617

Template:- The following is a list of the least populous counties and county-equivalents in all U.S. territory. Note that the only entity on this list with a permanent human population is Swains Island, American Samoa. The first 8 counties (county-equivalents) are uninhabited, while the 10th on the list (Palmyra Atoll) has a small non-permanent human population whose maximum capacity is 20 people.<ref>CIA World Factbook — Palmyra Atoll. Retrieved June 2019.</ref>

Smallest population counties in all U.S. territory
(2020 Census)<ref name="USCensus2020">Template:Cite web</ref>
Rank County Population
1 Baker Island, U.S. Minor Outlying Islands 0
2 Howland Island, U.S. Minor Outlying Islands 0
3 Jarvis Island, U.S. Minor Outlying Islands 0
4 Johnston Atoll, U.S. Minor Outlying Islands 0
5 Kingman Reef, U.S. Minor Outlying Islands 0
6 Navassa Island, U.S. Minor Outlying Islands 0
7 Northern Islands Municipality, Northern Mariana Islands 0
8 Rose Atoll, American Samoa 0
9 Swains Island, American Samoa 0
10 Palmyra Atoll, U.S. Minor Outlying Islands 20 Template:Refn


Population per state or territory

Template:See also

Most and least populous counties per state/territory (2021 Census estimate)<ref name="2021 qf dataset">Template:Cite web</ref>
State,
federal district,
or territory 		Least populous Population Most populous Population
Template:Flag Greene 7,629 Jefferson 667,820
Template:Flag Yakutat 704 Anchorage 288,121
Template:Flag Rose Atoll 0 Western District 31,819
Template:Flag Greenlee 9,404 Maricopa 4,496,588
Template:Flag Calhoun 4,741 Pulaski 397,821
Template:Flag Alpine 1,235 Los Angeles 9,829,544
Template:Flag San Juan 733 El Paso 737,867
Template:Flag Windham 116,418 Fairfield 959,768
Template:Flag Kent 184,149 New Castle 571,708
Template:Flag District of Columbia Template:Refn 670,050 District of Columbia 670,050
Template:Flag Liberty 7,900 Miami-Dade 2,662,777
Template:Flagicon Georgia Taliaferro 1,558 Fulton 1,065,334
Template:Flag Guam Template:Refn 153,835 Guam 153,835
Template:Flag Kalawao 82 Honolulu 1,000,890
Template:Flag Clark 792 Ada 511,931
Template:Flag Hardin 3,650 Cook 5,173,146
Template:Flag Ohio 5,978 Marion 971,102
Template:Flag Adams 3,641 Polk 496,844
Template:Flag Greeley 1,304 Johnson 613,219
Template:Flag Robertson 2,257 Jefferson 777,874
Template:Flag Tensas 4,043 East Baton Rouge 453,301
Template:Flag Piscataquis 17,165 Cumberland 305,231
Template:Flag Kent 19,270 Montgomery 1,054,827
Template:Flag Nantucket 14,491 Middlesex 1,614,742
Template:Flag Keweenaw 2,107 Wayne 1,774,816
Template:Flag Traverse 3,286 Hennepin 1,267,416
Template:Flag Issaquena 1,280 Hinds 222,679
Template:Flag Worth 1,983 St. Louis 997,187
Template:Flag Petroleum 519 Yellowstone 167,146
Template:Flag McPherson 379 Douglas 585,008
Template:Flag Esmeralda 743 Clark 2,292,476
Template:Flag Coos 31,268 Hillsborough 422,937
Template:Flag Salem 65,046 Bergen 953,819
Template:Flag Harding 639 Bernalillo 674,393
Template:Flag Hamilton 5,119 Kings 2,641,052
Template:Flag Tyrrell 3,254 Wake 1,150,204
Template:Flag Slope 690 Cass 186,562
Template:Flag Northern Islands Municipality 7 Saipan Municipality 43,385
Template:Flag Vinton 12,696 Franklin 1,321,414
Template:Flag Cimarron 2,248 Oklahoma 798,575
Template:Flag Wheeler 1,451 Multnomah 803,377
Template:Flag Cameron 4,459 Philadelphia 1,576,251
Template:Flag Culebra Municipality 1,792 San Juan Municipality 342,259
Template:Flag Bristol 50,818 Providence 658,221
Template:Flag Allendale 7,858 Greenville 533,834
Template:Flag Jones 879 Minnehaha 199,685
Template:Flag Pickett 5,079 Shelby 924,454
Template:Flag Loving 57 Harris 4,728,030
Template:Flagicon U.S. Minor Outlying Islands* 6 entities Template:Refn 0 Wake Island 100 Template:Refn
Template:Flag Daggett 976 Salt Lake 1,186,421
Template:Flag Essex 5,925 Chittenden 168,865
Template:Flagicon Virgin Islands (U.S.) Saint John Island 3,881 Saint Thomas Island 42,261
Template:Flag Highland 2,226 Fairfax 1,139,720
Template:Flag Garfield 2,286 King 2,269,675
Template:Flag Wirt 5,063 Kanawha 177,952
Template:Flag Menominee 4,289 Milwaukee 928,059
Template:Flag Niobrara 2,438 Laramie 100,863

Area

Nationwide land area extremes

Template:See also

The largest counties and county-equivalents are organized boroughs and the census areas of Alaska with the top two being Yukon–Koyukuk Census Area (Template:Convert) and North Slope Borough (Template:Convert). The smallest counties and county equivalents (in the 50 states) are the independent cities of Virginia with the extreme being Falls Church at Template:Convert.<ref name="2021 qf dataset" /> If the U.S. territories are included, the smallest county-equivalent is Kingman Reef, with a land area of Template:Convert.<ref>https://www.britannica.com/place/Kingman-Reef ‘’Kingman Reef.’’ Britannica.com. Retrieved July 7, 2018.</ref>

The following two tables exclude county-equivalents:

Largest counties by land area nationwide (excluding county-equivalents)<ref name="2021 qf dataset" />
Rank County Land area
(sq mi) 		Land area
(km2)
1 San Bernardino County, California 20,056.94 51,947.24
2 Coconino County, Arizona 18,618.89 48,222.70
3 Nye County, Nevada 18,181.92 47,090.96
4 Elko County, Nevada 17,169.83 44,469.66
5 Mohave County, Arizona 13,311.08 34,475.54
6 Apache County, Arizona 11,197.52 29,001.44
7 Lincoln County, Nevada 10,633.20 27,539.86
8 Sweetwater County, Wyoming 10,426.65 27,004.90
9 Inyo County, California 10,180.88 26,368.36
10 Harney County, Oregon 10,133.17 26,244.79
Smallest counties by land area nationwide (excluding county-equivalents)<ref name="2021 qf dataset" />
Rank County Land area
(sq mi) 		Land area
(km2)
1 Kalawao County, Hawaii 11.99 31.05
2 New York County, New York 22.83 59.13
3 Bristol County, Rhode Island 24.16 62.57
4 Arlington County, Virginia 25.97 67.26
5 Broomfield County, Colorado 33.03 85.55
6 Bronx County, New York 42.10 109.04
7 Nantucket County, Massachusetts 44.97 116.47
8 Hudson County, New Jersey 46.19 119.63
9 San Francisco County, California 46.87 121.39
10 Suffolk County, Massachusetts 58.15 150.61

Template:-

The following two tables include county-equivalents: Template:Refn

Largest counties by land area nationwide (including county-equivalents)
Rank County Land area
(sq mi) 		Land area
(km2)
1 Yukon-Koyukuk Census Area, Alaska 145,899.69 377,868.5
2 North Slope Borough, Alaska 88.817.12 230,035.3
3 Bethel Census Area, Alaska 40.633.31 105,239.8
4 Northwest Arctic Borough, Alaska 35,898.34 92,976.3
5 Valdez-Cordova Census Area, Alaska 34,319.1 88,886
6 Southeast Fairbanks Census Area, Alaska 24,814.86 64,270.2
7 Matanuska-Susitna Borough, Alaska 24,681.54 63,924.9
8 Lake and Peninsula Borough, Alaska 23,781.96 61,595.0
9 Nome Census Area, Alaska 23,000.91 59,572
10 San Bernardino County, California 20,052.5 51,936
Smallest counties by land area nationwide (including county-equivalents)
Rank County Land area
(sq mi) 		Land area
(km2)
1 Kingman Reef, U.S. Minor Outlying Islands 0.01 0.03
2 Rose Atoll, American Samoa 0.1 0.3
3 Baker Island, U.S. Minor Outlying Islands 0.5 1.4
4 Howland Island, U.S. Minor Outlying Islands 0.6 1.6
5 Swains Island, American Samoa 1 2.6
6 Johnston Atoll, U.S. Minor Outlying Islands 1.1 2.8
7 Jarvis Island, U.S. Minor Outlying Islands 1.7 4.5
8 Navassa Island, U.S. Minor Outlying Islands 2.08 5.4
9 Independent City of Falls Church, Virginia 2.1 5.44
10 Midway Atoll, U.S. Minor Outlying Islands 2.4 6.2
Smallest counties by land area in the 50 states and District of Columbia (including county-equivalents)
Rank County Land area
(sq mi) 		Land area
(km2)
1 Independent City of Falls Church, Virginia 2.1 5.4
2 Independent City of Lexington, Virginia 2.5 6.5
3 Independent City of Manassas Park, Virginia 2.5 6.5
4 Independent City of Covington, Virginia 4 10
5 Independent City of Fairfax, Virginia 6 16
6 Independent City of Buena Vista, Virginia 7 18
7 Independent City of Emporia, Virginia 7 18
8 Independent City of Norton, Virginia 7 18
9 Independent City of Colonial Heights, Virginia 8 21
10 Independent City of Franklin, Virginia 8 21
11 Independent City of Galax, Virginia 8 21

Template:-


Smallest, largest, and average area per state and territory

Template:See also

The following is a list of civil right appeal of jury appeal of judge counties and county-equivalents showing the average size of each state/territory's counties, the smallest county (or equivalent) in each state/territory, and the largest county (or equivalent) in each state/territory. States/territories on the list are arranged by the average land area of their counties. Though not on the list, the North Slope Borough is the largest independently incorporated county equivalent. The Unorganized Borough is substantially larger, but is an extension of the State of Alaska government and not independently incorporated.Template:Cref

Also note that the smallest land area with county-level governance in the U.S. is Falls Church, Virginia, but it is an independent city and not a county or part of one. Kingman Reef is the smallest county-equivalent in all U.S. territory (though it has no government). Kalawao County, Hawaii is the smallest true county by land area.

Smallest, largest and average land areas for counties and county-equivalents by state and territory<ref name="census2010" />
State
federal district
or territory 		Avg. county land area, sq. mi. (km2) Smallest county Area, sq. mi. (km2) Largest county area, sq. mi. (km2)
The 50 states & D.C. Template:ConvertTemplate:Refn Independent City of Falls Church, Virginia Template:Convert Yukon-Koyukuk Census Area, AlaskaTemplate:Refn Template:Convert
The 50 states, D.C.
& U.S. territories 		Template:ConvertTemplate:Refn Kingman Reef, U.S. Minor Outlying Islands Template:Convert Yukon-Koyukuk Census Area, Alaska Template:Convert
Template:Flag Template:Convert Skagway Municipality Template:Convert Yukon-Koyukuk Census Area Template:Convert
Template:Flag Template:Convert Santa Cruz County Template:Convert Coconino County Template:Convert
Template:Flag Template:Convert City of Carson City Template:Convert Nye County Template:Convert
Template:Flag Template:Convert Hot Springs County Template:Convert Sweetwater County Template:Convert
Template:Flag Template:Convert Los Alamos County Template:Convert Catron County Template:Convert
Template:Flag Template:Convert Davis County Template:Convert San Juan County Template:Convert
Template:Flag Template:Convert San Francisco County Template:Convert San Bernardino County Template:Convert
Template:Flag Template:Convert Multnomah County Template:Convert Harney County Template:Convert
Template:Flag Template:Convert Silver Bow County Template:Convert Beaverhead County Template:Convert
Template:Flag Template:Convert Sagadahoc County Template:Convert Aroostook County Template:Convert
Template:Flag Template:Convert Payette County Template:Convert Idaho County Template:Convert
Template:Flag Template:Convert San Juan County Template:Convert Okanogan County Template:Convert
Template:Flag Template:Convert Broomfield County Template:Convert Las Animas County Template:Convert
Template:Flag Template:Convert Eddy County Template:Convert McKenzie County Template:Convert
Template:Flag Template:Convert Kalawao County Template:Convert Hawaii County Template:Convert
Template:Flag Template:Convert Clay County Template:Convert Meade County Template:Convert
Template:Flag Template:Convert Rockwall County Template:Convert Brewster County Template:Convert
Template:Flag Template:Convert Ramsey County Template:Convert St. Louis County Template:Convert
Template:Flag Template:Convert Strafford County Template:Convert Coos County Template:Convert
Template:Flag Template:Convert Marshall County Template:Convert Osage County Template:Convert
Template:Flag Template:Convert Sarpy County Template:Convert Cherry County Template:Convert
Template:Flag Template:Convert Union County Template:Convert Collier County Template:Convert
Template:Flag Template:Convert Wyandotte County Template:Convert Butler County Template:Convert
Template:Flag Template:Convert Etowah County Template:Convert Baldwin County Template:Convert
Template:Flag Template:Convert New York County Template:Convert St. Lawrence County Template:Convert
Template:Flag Template:Convert Pepin County Template:Convert Marathon County Template:Convert
Template:Flag Template:Convert Lafayette County Template:Convert Union County Template:Convert
Template:Flag Template:Convert Benzie County Template:Convert Marquette County Template:Convert
Template:Flag Template:Convert Orleans Parish Template:Convert Vernon Parish Template:Convert
Template:Flag Template:Convert Montour County Template:Convert Lycoming County Template:Convert
Template:Flag Template:Convert Grand Isle County Template:Convert Windsor County Template:Convert
Template:Flag Template:Convert McCormick County Template:Convert Horry County Template:Convert
Template:Flag Template:Convert New Castle County Template:Convert Sussex County Template:Convert
Template:Flag Template:Convert Middlesex County Template:Convert Litchfield County Template:Convert
Template:Flag Template:Convert City of St. Louis Template:Convert Texas County Template:Convert
Template:Flag Template:Convert Alcorn County Template:Convert Yazoo County Template:Convert
Template:Flag Template:Convert Dickinson County Template:Convert Kossuth County Template:Convert
Template:Flag Template:Convert Nantucket County Template:Convert Worcester County Template:Convert
Template:Flag Template:Convert Putnam County Template:Convert McLean County Template:Convert
Template:Flag Template:Convert Chowan County Template:Convert Robeson County Template:Convert
Template:Flag Template:Convert Lake County Template:Convert Ashtabula County Template:Convert
Template:Flag Template:Convert Hancock County Template:Convert Randolph County Template:Convert
Template:Flag Template:Convert Trousdale County Template:Convert Shelby County Template:Convert
Template:Flag Template:Convert City of Baltimore Template:Convert Frederick County Template:Convert
Template:Flag Template:Convert Ohio County Template:Convert Allen County Template:Convert
Template:Flagicon Georgia Template:Convert Clarke County Template:Convert Ware County Template:Convert
Template:Flag Template:Convert Hudson County Template:Convert Burlington County Template:Convert
Template:Flag Template:Convert Robertson County Template:Convert Pike County Template:Convert
Template:Flag Template:Convert Independent City of Falls Church Template:Convert Pittsylvania County Template:Convert
Template:Flag Template:Convert Guam Template:Convert Guam Template:Convert
Template:Flag Template:Convert Bristol County Template:Convert Providence County Template:Convert
Template:Flag Template:Convert District of Columbia Template:Convert District of Columbia Template:Convert
Template:Flag Template:Convert Cataño Municipality Template:Convert Arecibo Municipality Template:Convert
Template:Flag Template:Convert Rota Municipality Template:Convert Northern Islands Municipality Template:Convert
Template:Flag Template:Convert Saint John Template:Convert Saint Croix Template:Convert
Template:Flag Template:Convert Rose Atoll Template:Convert Western District Template:Convert
Template:Flagicon U.S. Minor Outlying Islands Template:Convert Kingman Reef Template:Convert Palmyra Atoll Template:Convert

Population density

New York County, New York (Manhattan), the most densely populated county in the United States. At the top and top-left (beyond the East River) is Kings County (Brooklyn), the second-most densely populated county in the United States.

Most densely populated

Template:See also

Data presented below is based on U.S. Census department data from 2010.<ref name="census2010">Template:Cite web</ref> Calculations are made by dividing the population by the land area. All county equivalents are included. This list includes the 50 most densely populated counties and county-equivalents in the 50 states and District of Columbia, plus the 9 highest-density municipalities (county-equivalents) of Puerto Rico. Puerto Rico is the only U.S. territory with population densities (of county-equivalents) high enough to be on this list.<ref>Template:Cite web</ref> Note that many of these high-density counties are coterminous with large cities (for example San Francisco and Philadelphia) or are independent cities in Virginia (as well as Baltimore and St. Louis) which are considered county-equivalents.

Rank County name Principal cities Pop/sq mi Pop/km2
1 New York County, New York Manhattan, New York City 69,468 26,822
2 Kings County, New York Brooklyn, New York City 35,369 13,656
3 Bronx County, New York The Bronx, New York City 32,903 12,704
4 Queens County, New York Queens, New York City 20,554 7,936
5 City and County of San Francisco, California San Francisco 17,179 6,633
6 Hudson County, New Jersey Hoboken, Jersey City 13,732 5,302
7 Suffolk County, Massachusetts Boston 12,417 4,794
8 Philadelphia County, Pennsylvania Philadelphia 11,379 4,394
9 Washington, District of Columbia 9,857 3,806
10 Alexandria, Virginia 9,314 3,596
11 Arlington County, Virginia Arlington 8,853 3,520
12 San Juan Municipality, Puerto Rico 8,262 3,190
13 Richmond County, New York Staten Island, New York City 8,030 3,101
14 City of Baltimore, Maryland 7,672 2,962
15 Essex County, New Jersey Newark 6,212 2,398
16 Falls Church, Virginia 6,170 2,382
17 Cataño Municipality, Puerto Rico 5,809 2,243
18 Manassas Park, Virginia 5,633 2,175
19 Cook County, Illinois Chicago 5,495 2,122
20 Union County, New Jersey Elizabeth 5,216 2,014
21 City of Saint Louis, Missouri 5,157 1,991
22 Nassau County, New York Hempstead, western Long Island 4,705 1,817
23 Bayamón Municipality, Puerto Rico 4,695 1,813
24 Norfolk, Virginia 4,486 1,732
25 Charlottesville, Virginia 4,242 1,638
26 Milwaukee County, Wisconsin Milwaukee 3,926 1,516
27 Denver County, Colorado Denver 3,923 1,515
28 Carolina Municipality, Puerto Rico 3,900 1,506
29 Bergen County, New Jersey Hackensack 3,884 1,500
30 Toa Baja Municipality, Puerto Rico 3,856 1,489
31 Manassas, Virginia 3,828 1,478
32 Orange County, California Anaheim, Santa Ana, Irvine 3,808 1,470
33 Fairfax City, Virginia 3,617 1,396
34 Trujillo Alto Municipality, Puerto Rico 3,604 1,392
35 Guaynabo Municipality, Puerto Rico 3,551 1,371
36 Richmond, Virginia 3,415 1,318
37 Pinellas County, Florida St. Petersburg 3,348 1,292
38 Ramsey County, Minnesota St. Paul 3,342 1,290
39 Delaware County, Pennsylvania Southwest Philadelphia suburbs 3,039 1,173
40 Wayne County, Michigan Detroit 2,974 1,148
41 Portsmouth, Virginia 2,839 1,096
42 Winchester, Virginia 2,838 1,096
43 Lexington, Virginia 2,820 1,089
44 Harrisonburg, Virginia 2,808 1,084
45 Cuyahoga County, Ohio Cleveland 2,800 1,081
46 DuPage County, Illinois Western Chicago suburbs 2,800 1,081
47 Fairfax County, Virginia Washington, D.C. suburbs 2,767 1,068
48 Toa Alta Municipality, Puerto Rico 2,742 1,058
49 Dallas County, Texas Dallas 2,718 1,049
50 Passaic County, New Jersey Paterson 2,715 1,048
51 Hampton, Virginia 2,674 1,032
52 Newport News, Virginia 2,634 1,017
53 Middlesex County, New Jersey New Brunswick, Edison 2,622 1,012
54 DeKalb County, Georgia Atlanta suburbs and small part of Atlanta 2,586 998
55 Caguas Municipality, Puerto Rico 2,439 942
56 Los Angeles County, California Los Angeles 2,420 934
57 Harris County, Texas Houston 2,402 928
58 Fredericksburg, Virginia 2,326 898
59 Camden County, New Jersey Camden 2,322 896

Least densely populated

Baker Island, U.S. Minor Outlying Islands — one of the 8 county-equivalents with zero people

This list was generated by dividing the population by the land area. All county equivalents are included. The list is dominated by just a few states: Alaska, Montana, and Texas together comprise about two-thirds of the entries. The Unorganized Borough is not included here as a unit, but its census areas (non-governmental entities) are. If the census areas were removed from the list, the Unorganized Borough would rank fourteenth with a density of Template:Convert.

The 8 uninhabited county-equivalents in the U.S. territories are listed at the top of the table — these are technically the least-densely populated counties/county-equivalents in the United States, but since they have no people, they are listed unranked.

Counties with lowest population densities<ref name="census2010" />
Rank County name Pop/sq mi Pop/km2
— Baker Island, U.S. Minor Outlying Islands 0 0
— Howland Island, U.S. Minor Outlying Islands 0 0
— Jarvis Island, U.S. Minor Outlying Islands 0 0
— Johnston Atoll, U.S. Minor Outlying Islands 0 0
— Kingman Reef, U.S. Minor Outlying Islands 0 0
— Navassa Island, U.S. Minor Outlying Islands 0 0
— Northern Islands Municipality, Northern Mariana Islands 0 0
— Rose Atoll, American Samoa 0 0
1 Yukon–Koyukuk Census Area, Alaska 0.03 0.01
2 Lake and Peninsula Borough, Alaska 0.06 0.02
3 Yakutat Borough, Alaska 0.08 0.03
4 North Slope Borough, Alaska 0.10 0.04
5 Loving County, Texas 0.12 0.04
6 Denali Borough, Alaska 0.14 0.05
7 Northwest Arctic Borough, Alaska 0.21 0.08
8 Esmeralda County, Nevada 0.21 0.08
9 Garfield County, Montana 0.25 0.10
10 Dillingham Census Area, Alaska 0.26 0.10
11 Valdez-Cordova Census Area, Alaska 0.28 0.10
12 Southeast Fairbanks Census Area, Alaska 0.28 0.11
13 Kenedy County, Texas 0.28 0.11
14 Hoonah-Angoon Census Area, Alaska 0.28 0.11
15 Petroleum County, Montana 0.29 0.11
16 King County, Texas 0.31 0.12
17 Harding County, New Mexico 0.32 0.12
18 Carter County, Montana 0.34 0.13
19 Nome Census Area, Alaska 0.41 0.16
20 Terrell County, Texas 0.41 0.16
21 Bethel Census Area, Alaska 0.41 0.16
22 Kusilvak Census Area, Alaska 0.43 0.16
23 Aleutians East Borough, Alaska 0.45 0.17
24 Harding County, South Dakota 0.47 0.18
25 Eureka County, Nevada 0.47 0.18
26 Lincoln County, Nevada 0.50 0.19
27 Powder River County, Montana 0.52 0.20
28 Catron County, New Mexico 0.53 0.20
29 Clark County, Idaho 0.55 0.21
30 Slope County, North Dakota 0.59 0.23
31 McMullen County, Texas 0.62 0.24
32 McPherson County, Nebraska 0.62 0.24
33 Culberson County, Texas 0.62 0.24
34 Sioux County, Nebraska 0.63 0.24
35 Arthur County, Nebraska 0.64 0.24
36 McCone County, Montana 0.65 0.25
37 Blaine County, Nebraska 0.67 0.26
38 Prairie County, Montana 0.67 0.26
39 Billings County, North Dakota 0.68 0.26
40 Borden County, Texas 0.71 0.27
41 Harney County, Oregon 0.73 0.28
42 Treasure County, Montana 0.73 0.28
43 Golden Valley County, Montana 0.75 0.29
44 Hinsdale County, Colorado 0.75 0.29
45 Hudspeth County, Texas 0.76 0.29
46 Meagher County, Montana 0.79 0.30
47 Kiowa County, Colorado 0.79 0.30
48 Grant County, Nebraska 0.79 0.30
49 Mineral County, Colorado 0.81 0.31
50 Phillips County, Montana 0.82 0.31

Population density per state and territory

Data presented below is based on U.S. Census Bureau data from 2010.<ref name="census2010" /> Calculations are made by dividing the population by the land area. All county equivalents are included.

Excluding the census areas of Alaska, Lake and Peninsula Borough is the least densely populated county equivalent with Template:Convert.

The District of Columbia and Guam each only have one county-equivalent, so their most/least densely populated county is the same.

State
federal district
or territory 		Least densely populated county Population density Most densely populated county Population density
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See also

Notes

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Template:Reflist

References

Template:Reflist

Template:USCountyLists Template:U.S. Counties Template:Articles on second-level administrative divisions of North American countries

de:County (Vereinigte Staaten)#Statistiken

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