View source for Yuma County, Arizona

{{short description|County in Arizona, United States}}
{{for|the county in Colorado|Yuma County, Colorado}}
{{infobox U.S. county
 | county               = Yuma County
 | state                = Arizona
 | flag                 = Flag_of_Yuma_County,_Arizona.svg
 | seal                 = Yuma County Arizona Seal.png
 | ex image             = {{photomontage|photo1a=Old Yuma City Hall.jpg|photo2a=Olneya-tesota-01.jpg|photo2b=Ocean to Ocean Bridge, Yuma, AZ.jpg|photo3a=Yuma County Courthouse.jpg|photo3b=Kofa Mountains 002.jpg|photo4a=Mcphaul's bridge, yuma.jpg|photo4b=Downtown Yuma Arizona (3).jpg|photo5a=Yuma County 651.jpg|spacing=2|color_border=white|color=white|size=300|foot_montage=Clockwise from top: Old Yuma City Hall, [[Ocean to Ocean Bridge]], [[Kofa Mountains]], Downtown Yuma, Yuma County administration building, [[McPhaul Suspension Bridge]], Yuma County Courthouse and the [[Sonoran Desert]] near Yuma.}}
 | founded year         = 1864
 | founded date         = November 9
 | seat wl              = Yuma
 | largest city wl      = Yuma
 | area_total_sq_mi     = 5519
 | area_land_sq_mi      = 5514
 | area_water_sq_mi     = 5.1
 | area percentage      = 0.1
 | population_as_of     = 2020
 | population_total     = 203881
 | pop_est_as_of        = 2024
 | population_est       = 220310
 | population_density_sq_mi = auto
 | time zone            = Mountain
 | web                  = www.yumacountyaz.gov
 | footnote             = 
 | district             = 7th
 | district2            = 9th
 | named for            = [[Quechan|Yuma (Quechan) people]]
}}

'''Yuma County''' is a [[County (United States)|county]] in the southwestern corner of the [[U.S. state]] of [[Arizona]], one of 15 [[List of counties in Arizona|counties in the state]]. As of the [[2020 United States census|2020 census]], its population was 203,881.<ref name="QF">{{cite web|title=State & County QuickFacts |url=https://www.census.gov/quickfacts/fact/table/yumacountyarizona/PST045221 |publisher=United States Census Bureau |access-date=September 27, 2022}}</ref> The [[county seat]] is [[Yuma, Arizona|Yuma]].<ref name="GR6">{{cite web|url=http://www.naco.org/Counties/Pages/FindACounty.aspx|access-date=June 7, 2011|title=Find a County|publisher=National Association of Counties|url-status=dead|archive-url=https://web.archive.org/web/20110531210815/http://www.naco.org/Counties/Pages/FindACounty.aspx|archive-date=May 31, 2011}}</ref>

Yuma County includes the Yuma, Arizona [[Yuma metropolitan area|Metropolitan Statistical Area]].

The county borders three states: [[Sonora]], Mexico, to the south, and two other states to the west, across the [[Colorado River]]: [[California]] of the United States and the Mexican state of [[Baja California]].

Being 63.8% Hispanic in 2020, Yuma is [[List of Majority-Hispanic or Latino Counties in the U.S.|Arizona's largest majority-Hispanic county]].<ref name="2020Census">{{cite web |title=2020 Census |url=https://www.census.gov/programs-surveys/decennial-census/decade/2020/2020-census-main.html |website=2020 Census |publisher=United States Census Bureau |access-date=September 24, 2021 }}</ref>

==History==
Long settled by [[Native Americans in the United States|Native Americans]] of [[Indigenous peoples|indigenous cultures]] for thousands of years, this area was controlled by the [[Spanish Empire]] in the colonial era. In the 19th century, it was part of independent [[Mexico]] before the [[Mexican–American War]] and [[Gadsden Purchase]].

Yuma County was one of four original Arizona counties created by the [[1st Arizona Territorial Legislature]].<ref>{{cite web|title=Yuma County Sheriff's Office: History|url=https://www.yumacountysheriff.org/about-history.html|access-date=October 30, 2021|website=www.yumacountysheriff.org}}</ref> The county territory was defined as being west of longitude 113° 20' and south of the [[Bill Williams River]].<ref>{{cite book | last = Wagoner | first = Jay J. | title = Arizona Territory 1863–1912: A Political history | publisher = University of Arizona Press | location = Tucson | year = 1970 | isbn = 0816501769 | pages = [https://archive.org/details/arizonaterritory00wago/page/58 58] | url-access = registration | url = https://archive.org/details/arizonaterritory00wago/page/58 }}</ref> Its original boundaries remained the same until 1982, when [[La Paz County, Arizona|La Paz County]] was created from its northern half.

The original county seat was the city of La Paz; in 1871 it was moved to Arizona City, later renamed as Yuma in 1873.<ref>Walker, Henry (1986). ''Historical Atlas of Arizona,'' p. 32. University of Oklahoma Press, Norman. {{ISBN|978-0806120249}}</ref>{{dead link|date=July 2024}}

==Economy==
This county is the highest crop producer in the state by dollar value per year.<ref name="2017-census-county" /> Yuma County tops the list for the categories of vegetables + melons + potatoes + sweet potatoes at $782,293,000, and fruits + tree nuts + berries at $62,499,000.<ref name="2017-census-county" /> Overall this is the second (to [[Maricopa County|Maricopa]]) producing county for all agricultural products at $1,143,068,000 per year<ref name="2017-census-county">{{cite web | access-date=July 29, 2022 | date=2017 | title=Census of Agriculture - State and County Profiles - Arizona | website=USDA, [[National Agricultural Statistics Service]] | url=https://www.nass.usda.gov/Publications/AgCensus/2017/Online_Resources/County_Profiles/Arizona/cp04027.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.nass.usda.gov/Publications/AgCensus/2017/Online_Resources/County_Profiles/Arizona/cp04027.pdf |archive-date=October 9, 2022 |url-status=live}}</ref> and for [[organic agriculture|organic production]].<ref name="2017-census-state" />{{rp|page=320}} Almost all of the dates (''[[Phoenix dactylifera]]'') in the state are grown here,<ref name="2017-census-state" />{{rp|page=299}} about {{convert|10|e6lb|MT ST|abbr=off}} worth $35 million per year.<ref name="KAWC-dates">{{cite web | year=2017 | website=[[KAWC-FM]] | access-date=September 16, 2022 | title="Naked Dates"? Harvest for the Middle Eastern Fruit Wraps up in Yuma County | url=https://www.kawc.org/agriculture/2017-11-06/naked-dates-harvest-for-the-middle-eastern-fruit-wraps-up-in-yuma-county}}</ref> This is the second highest [[citrus]] producer behind Maricopa,<ref name="2017-census-state" />{{rp|page=302}} a distant second in [[grapefruit]],<ref name="2017-census-state" />{{rp|page=302}} [[lime (fruit)|lime]]s,<ref name="2017-census-state" />{{rp|page=302}} and [[orange (fruit)|orange]]s<ref name="2017-census-state" />{{rp|page=303}} but producing far more [[lemon]]s.<ref name="2017-census-state" />{{rp|page=302}} Some olives,<ref name="2017-census-state" />{{rp|page=299}} [[clingstone peach]]es,<ref name="2017-census-state" />{{rp|page=300}} and [[plum]]s<ref name="2017-census-state" />{{rp|page=301}} are grown here. Yuma County produces almost all of the vegetable seed grown in the state.<ref name="2017-census-state" />{{rp|page=311}} The average farmer age is the lowest in the state, at 56.6 years.<ref name="2017-census-state">{{cite web | access-date=July 29, 2022 | date=2017 | title=National Agricultural Statistics Service - 2017 Census of Agriculture - Volume 1, Chapter 1: State Level Data | website=USDA, [[National Agricultural Statistics Service]] | url=https://www.nass.usda.gov/Publications/AgCensus/2017/Full_Report/Volume_1,_Chapter_1_State_Level/Arizona/}}</ref>{{rp|page=326}}

During the winter agricultural season from November to March, some 40,000 Mexican workers cross the border daily to work in United States fields.<ref name="yuma"/> The area is watered by the [[Colorado River]], and the sector supplies a large part of the US leafy vegetables.<ref>{{cite web |title=Sweat Vinaigrette |url=http://ediblebajaarizona.com/sweat-vinaigrette |website=Edible Baja Arizona Magazine |date=May 9, 2016}}</ref><ref>{{cite web |last1=Nolte |first1=Kurt D. |title=Winter Lettuce Production |url=https://cals.arizona.edu/fps/sites/cals.arizona.edu.fps/files/Lettuce%20Production%20Presentation.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://cals.arizona.edu/fps/sites/cals.arizona.edu.fps/files/Lettuce%20Production%20Presentation.pdf |archive-date=October 9, 2022 |url-status=live |publisher=[[University of Arizona]]}}</ref> The [[Yuma Lettuce Days]] festival and [[agritourism]] is connected to Yuma agriculture. In 2017 the county produced vegetables worth $782,293,000, ranking first in the state and third in the entire country, from {{convert|107,908|acre}}.<ref name="2017-census-state" /> Fruits brought $62,499,000, also first in the state, 56th out of >3000 counties in the country.<ref name="2017-census-state">{{cite web | access-date=July 29, 2022 | date=2017 | title=National Agricultural Statistics Service - 2017 Census of Agriculture - Volume 1, Chapter 1: State Level Data | website=USDA, [[National Agricultural Statistics Service]] | url=https://www.nass.usda.gov/Publications/AgCensus/2017/Full_Report/Volume_1,_Chapter_1_State_Level/Arizona/}}</ref> Jojoba (''[[Simmondsia chinensis]]'') is a valuable native crop here.<ref name="advances" />{{rp|page=239}} From here it has also been introduced into cultivation in other countries.<ref name="advances">{{cite book | pages=xv+744 | year=2019 | volume=6 | publication-place=[[Cham, Switzerland]] | publisher=[[Springer Nature Switzerland AG]] | last3=Johnson | last2=Jain | first3=Dennis Victor | last1=Al-Khayri | first1=Jameel M. | first2=S. Mohan | series=Advances in Plant Breeding Strategies | title=Industrial and Food Crops | isbn=978-3-030-23265-8 | doi=10.1007/978-3-030-23265-8 | s2cid=204460085 | id={{isbn|978-3-030-23264-1}}. {{isbn|978-3-030-23267-2}} | oclc=1124613891}}</ref>{{rp|page=239}}

The Sweetpotato Whitefly (Silverleaf Whitefly, ''[[Bemisia tabaci]]'') is a common pest here.<ref name="Charac-Man">{{cite book | last1=King | first1=Edgar George | last2=Phillips | first2=Jacob R. | last3=Coleman | first3=Randy J. | title=Cotton Insects and Mites: Characterization and Management | series=Cotton Foundation Reference Book Series | publisher=[[Cotton Foundation]] | publication-place=[[Memphis, Tennessee]] | date=1996 | isbn=978-0939809035 | oclc=35285443 | pages=1008}}</ref>{{rp|page=47}} The county is planted with large extents of several crops which serve as hosts.<ref name="Nic">{{cite book | date=1999 | publication-place=[[Tokyo]] | publisher=[[Springer Tokyo]] | last1=Yamamoto | first1=Izuru | last2=Casida | first2=John E. | title=Nicotinoid Insecticides and the Nicotinic Acetylcholine Receptor | isbn=978-4-431-67933-2 | oclc=828775443}}</ref>{{rp|page=263}}

Date trees (''[[Phoenix dactylifera]]'') were planted here in the 2010s.<ref name="Wakil" /> In this county, plantations suffer from the Carob Moth (''[[Ectomyelois ceratoniae]]'') and the Banks Grass Mite (''[[Oligonychus pratensis]]'').<ref name="Wakil">{{cite book | date=2015 | pages=xx+429 | publication-place=[[Cham, Switzerland]] | publisher=[[Springer International Publishing Switzerland]] | editor1-last=Wakil | editor1-first=Waqas | editor2-last=Faleiro | editor2-first=Jose Romeno | editor3-last=Miller | editor3-first=Thomas A. | title=Sustainable Pest Management in Date Palm: Current Status and Emerging Challenges | isbn=978-3-319-24397-9 | doi=10.1007/978-3-319-24397-9 | id={{isbn|978-3-319-24395-5}} | oclc=933587290 | lccn=2015958728 | series=Sustainability in Plant and Crop Protection| s2cid=28329824 }}</ref>

Leaders in the county are aware their economy is tied to that of Mexican states on the other side of the border; both have to be considered. "There are automotive plants in Ciudad Juárez, across from El Paso; aerospace plants in Mexicali, southwest of Yuma; and medical devices’ manufacturers in Tijuana, near San Diego. On the American side, there is a mix of retail stores, warehouses and trucking companies..."<ref name="yuma"/>

Because of Yuma County's location along the [[U.S.-Mexico border]], large numbers of aliens entering the United States illegally pass through Yuma County. From October 2004 to July 2005, some 124,400 undocumented foreign nationals were apprehended in the area, a 46% increase over the previous year.<ref>''Economist'', August 27, 2005</ref> In 2014, however, only 5,902 people were apprehended.  The report from the [[Congressional Research Service]] stated, "...it is unclear how much of the drop-off is due to increased enforcement and how much is a result of the U.S. economic downturn and other systemic factors".<ref name="l651">{{cite web | last=Holan | first=Angie Drobnic | title=Ben Carson claimed program that led to 97% illegal immigration drop has been 'abolished' | website=@politifact | date=September 27, 2015 | url=https://www.politifact.com/factchecks/2015/sep/27/ben-carson/ben-carson-claimed-program-let-97-illegal-immigrat/ | access-date=May 19, 2024}}</ref><ref name="yuma">[https://www.nytimes.com/2016/12/13/us/politics/yuma-county-arizona-latinos-trump.html?&moduleDetail=section-news-2&action=click&contentCollection=U.S.&region=Footer&module=MoreInSection&version=WhatsNext&contentID=WhatsNext&pgtype=article Fernanda Santo, "In Arizona County Where Latinos Have an Edge, So Did Trump"], ''New York Times,'' December 13, 2016; accessed December 13, 2016</ref>

The {{ Visible anchor | Greater Yuma Economic Development Corp }} anticipates many [[farmworkers in the United States|agricultural jobs]] in the county will soon transition to [[agricultural robot|robotics]].<ref name="US-Economic-Development-Administration">{{cite web | access-date=September 20, 2022 | author=[[Tucson|City of Tucson]] | title=City of Tucson | website=[[U.S. Economic Development Administration]] | url=https://eda.gov/arpa/build-back-better/finalists/City-of-Tucson.htm}}</ref>

==Government==
The Board of Supervisors is the governing body of the county and a number of special districts. The board has members from five districts.<ref>{{cite web|url=http://www.yumacountyaz.gov/government/board-of-supervisors|title=Board of Supervisors {{!}} Yuma County|website=www.yumacountyaz.gov|language=en|access-date=March 29, 2018}}</ref> The Board adopts ordinances, establishes programs, levies taxes, appropriates funds, appoints certain officials, and zones property and regulates development in the unincorporated area. In addition, members of the Board represent the county on numerous intergovernmental agencies.<ref>{{cite web|title=Committees served by Board Members {{!}} Yuma County|url=https://www.yumacountyaz.gov/government/board-of-supervisors/committees-served-by-board-members|access-date=July 6, 2020|website=www.yumacountyaz.gov}}</ref>

In Arizona's first 52 years as a state, Yuma County was a primarily Democratic county, only voting for the Republican candidates four times in presidential elections prior to 1968. From 1968 onward, it has consistently voted for Republican presidential candidates. In 2016, county voters elected more Democrats to the Board than Republicans for the first time since 2004.<ref>{{Cite news |last=Santos |first=Fernanda |date=December 13, 2016 |title=In Arizona County Where Latinos Have an Edge, So Did Trump |language=en-US |work=The New York Times |url=https://www.nytimes.com/2016/12/13/us/politics/yuma-county-arizona-latinos-trump.html |access-date=February 10, 2023 |issn=0362-4331}}</ref> However, their margins of victory have been reduced in recent years as the county has rapidly grown in population and become majority-Hispanic. [[Donald Trump]] only won the county by 560 votes over [[Hillary Clinton]] in the [[2016 United States presidential election in Arizona|presidential election of 2016]]. However, Trump's margin did improve to over 4,000 votes as he won the county again in [[2020 United States presidential election in Arizona|2020]] over [[Joe Biden]].

In [[2024 United States presidential election in Arizona|2024]], Trump won Yuma County by over 20 percentage points against [[Kamala Harris]], the best performance by a Republican since [[Ronald Reagan]] in [[1984 United States presidential election in Arizona|1984]].  
{{PresHead|place=Yuma County, Arizona|source=<ref>{{cite web|title = Dave Leip's Atlas of United States Presidential Elections | access-date = June 11, 2011 | url = http://uselectionatlas.org/RESULTS/}}</ref><ref>{{cite web|url=https://www.ourcampaigns.com/ContainerHistory.html?ContainerID=199|title=Our Campaigns|access-date=June 22, 2025}}</ref>}}
<!-- PresRow should be {{PresRow|Year|Winning party|GOP vote #|Dem vote #|3rd party vote #|State}} -->
{{PresRow|1912|Democratic|90|424|553|Arizona}}
{{PresRow|1916|Democratic|727|1,322|191|Arizona}}
{{PresRow|1920|Republican|1,606|1,177|0|Arizona}}
{{PresRow|1924|Republican|1,280|851|935|Arizona}}
{{PresRow|1928|Republican|2,328|1,589|0|Arizona}}
{{PresRow|1932|Democratic|1,162|3,463|205|Arizona}}
{{PresRow|1936|Democratic|976|3,428|195|Arizona}}
{{PresRow|1940|Democratic|1,870|4,138|23|Arizona}}
{{PresRow|1944|Democratic|1,831|3,472|10|Arizona}}
{{PresRow|1948|Democratic|2,324|4,483|157|Arizona}}
{{PresRow|1952|Republican|4,761|4,444|0|Arizona}}
{{PresRow|1956|Democratic|5,330|5,776|7|Arizona}}
{{PresRow|1960|Democratic|5,547|6,642|15|Arizona}}
{{PresRow|1964|Democratic|6,548|7,857|5|Arizona}}
{{PresRow|1968|Republican|6,856|5,770|2,007|Arizona}}
{{PresRow|1972|Republican|9,596|4,755|755|Arizona}}
{{PresRow|1976|Republican|9,324|7,998|558|Arizona}}
{{PresRow|1980|Republican|13,393|6,014|1,738|Arizona}}
{{PresRow|1984|Republican|13,848|6,458|175|Arizona}}
{{PresRow|1988|Republican|13,253|8,952|275|Arizona}}
{{PresRow|1992|Republican|11,652|10,367|6,026|Arizona}}
{{PresRow|1996|Republican|13,013|12,267|2,391|Arizona}}
{{PresRow|2000|Republican|15,708|12,055|889|Arizona}}
{{PresRow|2004|Republican|22,184|16,032|313|Arizona}}
{{PresRow|2008|Republican|24,577|18,559|636|Arizona}}
{{PresRow|2012|Republican|23,352|18,059|662|Arizona}}
{{PresRow|2016|Republican|25,165|24,605|3,240|Arizona}}
{{PresRow|2020|Republican|36,534|32,210|1,328|Arizona}}
{{PresRow|2024|Republican|40,745|26,823|767|Arizona}}
{{PresFoot}}

==Geography==
According to the [[United States Census Bureau]], the county has an area of {{convert|5519|sqmi}}, of which {{convert|5514|sqmi}} is land and {{convert|5.1|sqmi}} (0.1%) is water.<ref name="GR1">{{cite web|url=http://www2.census.gov/geo/docs/maps-data/data/gazetteer/counties_list_04.txt|publisher=United States Census Bureau|access-date=August 23, 2015|date=August 23, 2012|title=2010 Census Gazetteer Files}}</ref> The [[List of U.S. states by elevation|lowest point]] in the state of Arizona is on the [[Colorado River]] in [[San Luis, Arizona|San Luis]] in Yuma County, where it flows out of Arizona and into [[Sonora]] in [[Mexico]].

Yuma County is in the west, and northwestern regions of the north–south [[Sonoran Desert]] that extends through [[Sonora]] state of Mexico to the border of northern [[Sinaloa]] state. West of the county across the [[Colorado River]] in southeast California is the [[Colorado Desert]], (a northwestern subregion of the Sonoran Desert). North of the county, with La Paz County the regions merge into the southeastern [[Mojave Desert]]. Southwest of Yuma County, is the entirety of Northwest Mexico, at the north shoreline of the [[Gulf of California]], and the outlet of the Colorado River into the [[Colorado River Delta]] region, now altered with lack of freshwater inputs. Notable mountains in Yuma County include the [[Gila Mountains (Yuma County)|Gila Mountains]] and the [[Tule Mountains]].

===Adjacent counties and municipalities===
{{div col}}
* [[La Paz County, Arizona|La Paz County]] – north
* [[Maricopa County, Arizona|Maricopa County]] – east
* [[Pima County, Arizona|Pima County]] – southeast
* [[Sonora, Mexico]] – south
* [[Baja California|Baja California, Mexico]] – southwest
* [[Imperial County, California]] – west
{{div col end}}

===Major highways===
* [[Image:I-8 (AZ).svg|20px]] [[Interstate 8]]
* [[Image:US 80 (AZ historic).svg|20px]] [[Historic U.S. Route 80 (Arizona)|Historic U.S. Route 80]]
* [[Image:US 95.svg|20px]] [[U.S. Route 95 in Arizona|U.S. Route 95]]
* [[Image:Arizona 195.svg|20px]] [[Arizona State Route 195]]

===National protected areas===
* [[Cabeza Prieta National Wildlife Refuge]] (part)
* [[Imperial National Wildlife Refuge]] (part)
* [[Kofa National Wildlife Refuge]] (part)

===Climate===
{{Yuma, Arizona weatherbox}}

==Demographics==
{{US Census population
|1870= 1621
|1880= 3215
|1890= 2671
|1900= 4145
|1910= 7733
|1920= 14904
|1930= 17816
|1940= 19326
|1950= 28006
|1960= 46235
|1970= 60827
|1980= 90554
|1990= 106895
|2000= 160026
|2010= 195751
|2020= 203881
|estyear=2024
|estimate=220310
|estref=<ref name="USCensusEst2024">{{cite web|url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-counties-total.html|title=County Population Totals and Components of Change: 2020-2024|publisher=United States Census Bureau|access-date=May 15, 2025}}</ref>
|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|newspaper=Census.gov |publisher=United States Census Bureau|access-date=May 18, 2014}}</ref><br />1790–1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=May 18, 2014}}</ref> 1900–1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/az190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=May 18, 2014}}</ref><br />1990–2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=October 9, 2022 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=May 18, 2014}}</ref> 2010–2020<ref name="QF"/>
}}

===2020 census===
{| class="wikitable" style="text-align:center;"
|+'''Yuma County, Arizona – 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 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Yuma County, Arizona|url=https://data.census.gov/table?g=050XX00US04027&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) – Yuma County, Arizona |url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US04027&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!{{partial|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) – Yuma County, Arizona |url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US04027&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|70,956
|69,022
|style='background: #ffffe6; |61,123
|44.34%
|35.26%
|style='background: #ffffe6; |29.98%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|3,136
|3,169
|style='background: #ffffe6; |3,484
|1.96%
|1.62%
|style='background: #ffffe6; |1.71%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|1,819
|1,957
|style='background: #ffffe6; |1,888
|1.14%
|1.00%
|style='background: #ffffe6; |0.93%
|-
|[[Asian Americans|Asian]] alone (NH)
|1,362
|2,041
|style='background: #ffffe6; |2,321
|0.85%
|1.04%
|style='background: #ffffe6; |1.14%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|132
|204
|style='background: #ffffe6; |215
|0.08%
|0.10%
|style='background: #ffffe6; |0.11%
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|131
|216
|style='background: #ffffe6; |622
|0.08%
|0.11%
|style='background: #ffffe6; |0.31%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|1,718
|2,230
|style='background: #ffffe6; |4,225
|1.07%
|1.14%
|style='background: #ffffe6; |2.07%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|80,772
|116,912
|style='background: #ffffe6; |130,003
|50.47%
|59.72%
|style='background: #ffffe6; |63.76%
|-
|'''Total'''
|'''160,026'''
|'''195,751'''
|style='background: #ffffe6; |'''203,881'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

{| class="wikitable collapsible" style="text-align:center;"
!Race <small>(''NH = Non-Hispanic'')</small>
!% 1990<ref>{{cite book |title=Arizona: 1990 |pages=10 |url=https://www2.census.gov/library/publications/decennial/1990/cp-1/cp-1-4.pdf}}</ref>
!% 1980<ref>{{cite book |title=General Social and Economic Characteristics: Arizona |pages=24 |url=https://www2.census.gov/prod2/decennial/documents/1980a_azABC-04.pdf}}</ref>
!Pop 1990
!Pop 1980
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|54.4%
|60.7%
|58,151
|54,926
|-
|[[Non-Hispanic or Latino African Americans|Black]] alone (NH)
|2.6%
|2.6%
|2,776
|2,310
|-
|[[Native Americans in the United States|American Indian]] alone (NH)
|1.1%
|3.1%
|1,178
|2,774
|-
|[[Asian Pacific Americans|Asian or Pacific Islander]] alone (NH)
|1.1%
|0.9%
|1,188
|826
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|0.2%
|0.2%
|214
|188
|-
|[[Hispanic and Latino Americans|Hispanic/Latino]] (any race)
|40.6%
|32.6%
|43,388
|29,530
|}

===2010 census===
As of the [[2010 United States Census|2010 census]], there were 195,751 people, 64,767 households, and 48,976 families residing in the county.<ref name="census-dp1">{{cite web
  |url=http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_DP/DPDP1/0500000US04027
  |title=DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data
  |access-date=January 20, 2016
|publisher=[[United States Census Bureau]]
  |archive-url=https://archive.today/20200213030916/http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_DP/DPDP1/0500000US04027
  |archive-date=February 13, 2020
|url-status=dead
  }}</ref> The population density was {{convert|35.5|/mi2|/km2|disp=preunit|inhabitants&nbsp;|inhabitants|}}. There were 87,850 housing units at an average density of {{convert|15.9|/mi2|/km2|disp=preunit|units&nbsp;|units|}}.<ref name="census-density">{{cite web
  |url=http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_SF1/GCTPH1.CY07/0500000US04027
  |access-date=January 20, 2016
|title=Population, Housing Units, Area, and Density: 2010 – County
  |publisher=[[United States Census Bureau]]
  |archive-url=https://archive.today/20200213191756/http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_SF1/GCTPH1.CY07/0500000US04027
  |archive-date=February 13, 2020
|url-status=dead
  }}</ref> The racial makeup of the county was 70.4% white, 2.0% black or African American, 1.6% American Indian, 1.2% Asian, 0.2% Pacific islander, 20.8% from other races, and 3.8% from two or more races. Those of Hispanic or Latino origin made up 59.7% of the population.<ref name="census-dp1"/> In terms of ancestry, 10.6% were [[Germans|German]], 7.4% were [[English people|English]], 6.9% were [[Irish people|Irish]], and 3.2% were [[Americans|American]].<ref name="census-dp2">{{cite web
  |url=http://factfinder.census.gov/bkmk/table/1.0/en/ACS/10_5YR/DP02/0500000US04027
  |title=DP02 Selected Social Characteristics in the United States – 2006–2010 American Community Survey 5-Year Estimates
  |access-date=January 20, 2016
|publisher=[[United States Census Bureau]]
  |archive-url=https://archive.today/20200213024858/http://factfinder.census.gov/bkmk/table/1.0/en/ACS/10_5YR/DP02/0500000US04027
  |archive-date=February 13, 2020
|url-status=dead
  }}</ref>

Of the 64,767 households, 41.1% had children under the age of 18 living with them, 56.8% were married couples living together, 13.8% had a female householder with no husband present, 24.4% were non-families, and 19.6% of all households were made up of individuals. The average household size was 2.93 and the average family size was 3.39. The median age was 33.8 years.<ref name="census-dp1"/>

The median income for a household in the county was $40,340 and the median income for a family was $42,718. Males had a median income of $36,345 versus $27,262 for females. The per capita income for the county was $18,418. About 17.6% of families and 20.9% of the population were below the [[poverty line]], including 30.7% of those under age 18 and 12.7% of those age 65 or over.<ref name="census-dp3">{{cite web
  |url=http://factfinder.census.gov/bkmk/table/1.0/en/ACS/10_5YR/DP03/0500000US04027
  |title=DP03 Selected Economic Characteristics – 2006–2010 American Community Survey 5-Year Estimates
  |access-date=January 20, 2016
|publisher=[[United States Census Bureau]]
  |archive-url=https://archive.today/20200213035224/http://factfinder.census.gov/bkmk/table/1.0/en/ACS/10_5YR/DP03/0500000US04027
  |archive-date=February 13, 2020
|url-status=dead
  }}</ref>

===2000 census===
As of the [[census]] of 2000, there were 160,026 people, 53,848 households, and 41,678 families residing in the county. The [[population density]] was {{convert|29|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 74,140 housing units at an average density of {{convert|13|/mi2|/km2|disp=preunit|units&nbsp;|units|}}. The county's racial makeup was 68.3% [[Race (United States Census)|White]], 2.2% [[Race (United States Census)|Black]] or [[Race (United States Census)|African American]], 1.6% [[Race (United States Census)|Native American]], 0.9% [[Race (United States Census)|Asian]], 0.1% [[Race (United States Census)|Pacific Islander]], 23.6% from [[Race (United States Census)|other races]], and 3.2% from two or more races. 50.5% of the population were [[Race (United States Census)|Hispanic]] or [[Race (United States Census)|Latino]] of any race. 43.7% reported speaking [[Spanish language|Spanish]] at home [http://www.mla.org/map_data_results&state_id=4&county_id=27&mode=geographic&order=r Language Map Data Center].

There were 53,848 households, out of which 36.9% had children under the age of 18 living with them, 62.3% were [[Marriage|married couples]] living together, 11.2% had a female householder with no husband present, and 22.6% were non-families. 18.5% of all households were made up of individuals, and 8.9% had someone living alone who was 65 years of age or older. The average household size was 2.86 and the average family size was 3.27.

In the county, the population was spread out, with 28.9% under the age of 18, 10.0% from 18 to 24, 25.6% from 25 to 44, 18.9% from 45 to 64, and 16.5% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 102.0 males. For every 100 females age 18 and over, there were 101.1 males.

The median income for a household in the county was $32,182, and the median income for a family was $34,659. Males had a median income of $27,390 versus $22,276 for females. The [[per capita income]] for the county was $14,802. About 15.5% of families and 19.2% of the population were below the [[poverty line]], including 27.9% of those under age 18 and 8.7% of those age 65 or over.

==Communities==
[[Image:Yuma County Incorporated and Unincorporated areas.svg|thumb|right|250px|Map of Yuma County showing [[Municipal corporation|incorporated]] and [[unincorporated area]]s as well as [[Indian reservation]]s in the county.]]

===Cities===
* [[San Luis, Arizona|San Luis]]
* [[Somerton, Arizona|Somerton]]
* [[Yuma, Arizona|Yuma]] (county seat)

===Town===
* [[Wellton, Arizona|Wellton]]

===Census-designated places===
{{div col|colwidth=15em}}
* [[Avenue B and C, Arizona|Avenue B and C]]
* [[Aztec, Arizona|Aztec]]
* [[Buckshot, Arizona|Buckshot]]
* [[Dateland, Arizona|Dateland]]
* [[Donovan Estates, Arizona|Donovan Estates]]
* [[Drysdale, Arizona|Drysdale]]
* [[El Prado Estates, Arizona|El Prado Estates]]
* [[Fortuna Foothills, Arizona|Fortuna Foothills]]
* [[Gadsden, Arizona|Gadsden]]
* [[Martinez Lake, Arizona|Martinez Lake]]
* [[Orange Grove Mobile Manor, Arizona|Orange Grove Mobile Manor]]
* [[Padre Ranchitos, Arizona|Padre Ranchitos]]
* [[Rancho Mesa Verde, Arizona|Rancho Mesa Verde]]
* [[Tacna, Arizona|Tacna]]
* [[Wall Lane, Arizona|Wall Lane]]
* [[Wellton Hills, Arizona|Wellton Hills]]
* [[Yuma Proving Ground, Arizona (CDP)|Yuma Proving Ground]]
{{div col end}}

===Other unincorporated communities===
* [[Mohawk, Arizona|Mohawk]]
* [[Roll, Arizona|Roll]]

===Ghost towns===
{{div col|colwidth=20em}}
* [[Arizona City (Yuma, Arizona)|Arizona City]]
* [[Castle Dome, Arizona|Castle Dome]]
* [[Castle Dome Landing, Arizona|Castle Dome Landing]]
* [[Colorado City, Yuma County, Arizona|Colorado City]]
* [[Dome, Arizona|Dome]]
* [[Filibusters Camp]]
* [[Fortuna, Arizona|Fortuna]]
* [[Gila City, Arizona|Gila City]]
* [[Hyder, Arizona|Hyder]]
* [[Kofa, Arizona|Kofa]]
* [[La Laguna, Arizona|La Laguna]]
* [[Mission Camp]]
* Owl
* [[Pedrick's, Arizona|Pedrick's]]
* [[Polaris, Arizona|Polaris]]
{{div col end}}

===Indian reservations===
* [[Fort Yuma Indian Reservation]]
* [[Cocopah Indian Reservation]]

===County population ranking===
The population ranking of the following table is based on the [[2010 United States census|2010 census]] of Yuma County.<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census/decade.2010.html |publisher=[[United States Census Bureau]] |title=2010 U.S. Census website |access-date=February 13, 2016 }}</ref><ref>{{Cite web |url=https://www.census.gov/geo/maps-data/maps/block/2010/ |title=2010 Census Block Maps - Geography - U.S. Census Bureau |access-date=December 7, 2017 |archive-date=December 29, 2014 |archive-url=https://web.archive.org/web/20141229025439/http://www.census.gov/geo/maps-data/maps/block/2010/ |url-status=dead }}</ref>

'''†''' county seat

{| class="wikitable sortable"
|-
!Rank
!City/Town/etc.
!Population (2010 Census)
!Municipal type
!Incorporated
|- style="background:#ffff54;"
| 1
| '''† [[Yuma, Arizona|Yuma]]'''
| 93,064
| City
| 1914
|- style="background:#dbe9f4;"
| 2
| '''[[Fortuna Foothills, Arizona|Fortuna Foothills]]'''
| 26,265
| CDP
|
|- style="background:#ffff54;"
| 3
| '''[[San Luis, Arizona|San Luis]]'''
| 25,505
| City
| 1979
|- style="background:#ffff54;"
| 4
| '''[[Somerton, Arizona|Somerton]]'''
| 14,287
| City
|1918
|- style="background:#dbe9f4;"
| 5
| '''[[Avenue B and C, Arizona|Avenue B and C]]'''
| 4,176
| CDP
|
|- style="background:#bfb;"
| 6
| '''[[Wellton, Arizona|Wellton]]'''
| 2,882
| Town
| 1970
|- style="background:#dbe9f4;"
| 7
| '''Donovan Estates'''
| 1,508
| CDP
|
|- style="background:#dbe9f4;"
| 8
| '''Martinez Lake'''
| 798
| CDP
|
|- style="background:#dbe9f4;"
| 9
| '''[[Gadsden, Arizona|Gadsden]]'''
| 678
| CDP
|
|- style="background:#dbe9f4;"
| 10
| '''Rancho Mesa Verde'''
| 625
| CDP
|
|- style="background:#dbe9f4;"
| 11
| '''[[Tacna, Arizona|Tacna]]'''
| 602
| CDP
|
|- style="background:#dbe9f4;"
| 12
| '''Orange Grove Mobile Manor'''
| 594
| CDP
|
|- style="background:#dbe9f4;"
| 13
| '''El Prado Estates'''
| 504
| CDP
|
|- style="background:#dbe9f4;"
| 14
| '''[[Dateland, Arizona|Dateland]]'''
| 416
| CDP
|
|- style="background:#dbe9f4;"
| 15
| '''Wall Lane'''
| 415
| CDP
|
|- style="background:#dbe9f4;"
| 16
| '''Drysdale'''
| 272
| CDP
|
|- style="background:#dbe9f4;"
| 17
| '''Wellton Hills'''
| 258
| CDP
|
|- style="background:#dbe9f4;"
| 18
| '''Padre Ranchitos'''
| 171
| CDP
|
|- style="background:#dbe9f4;"
| 19
| '''Buckshot'''
| 153
| CDP
|
|- style="background:#dbe9f4;"
| 20
| '''Aztec'''
| 47
| CDP
|
|- style="background:#dbe9f4;"
| 21
| '''Yuma Proving Ground'''
| 0
| CDP
|
|}

==See also==
* [[National Register of Historic Places listings in Yuma County, Arizona]]

==Notes==
{{Notelist}}

==References==
;Specific
{{Reflist|30em}}

;General
* "Cross-Border, Cross-Purposes". ''The Economist''. August 27 – September 2, 2005.

==External links==
* [http://www.yumacountyaz.gov/ Yuma County official web site]
* {{osmrelation|1832216}}

{{Geographic Location
|Centre    = Yuma County, Arizona
|North     = [[La Paz County, Arizona|La Paz County]]
|Northeast =
|East      = [[Maricopa County, Arizona|Maricopa County]]<br />[[Pima County, Arizona|Pima County]]
|Southeast =
|South     = [[San Luis Río Colorado Municipality]] {{flagicon|Mexico}}
|Southwest =
|West      = [[Mexicali Municipality]] {{flagicon|Mexico}}
|Northwest = [[Imperial County, California]]
}}

{{Yuma County, Arizona}}
{{Arizona}}
{{Authority control}}

{{commonscat}}

{{Coord|32|47|13|N|113|58|58|W|region:US-AZ_type:adm2nd_source:dewiki|display=title}}

[[Category:Yuma County, Arizona| ]]
[[Category:Arizona placenames of Native American origin]]
[[Category:1864 establishments in Arizona Territory]]
[[Category:Populated places established in 1864]]