Yuma County, Arizona facts for kids

Kids Encyclopedia Facts
Yuma County, Arizona
Map
Map of Arizona highlighting Yuma County
Location in the state of Arizona
Map of the USA highlighting Arizona
Arizona's location in the U.S.
Statistics
Founded November 9, 1864
Seat Yuma
Largest City Yuma
Area
 - Total
 - Land
 - Water

5,519 sq mi (14,294 km²)
5,514 sq mi (14,281 km²)
5.1 sq mi (13 km²), 0.09%
PopulationEst.
 - (2015)
 - Density

204,275
37/sq mi (14/km²)
Time zone Mountain: UTC-7
Website: www.yumacountyaz.gov

Yuma County is a county in the southwestern corner of the U.S. state of Arizona. As of the 2010 census, its population was 195,751. The county seat is Yuma.

Yuma County comprises the Yuma, AZ Metropolitan Statistical Area.

The county borders the Colorado River to the southwest, with three other states across the river: California of the United States and the Mexican state of Baja California to the west, and Sonora, Mexico, 60 miles to the south.

History

Long settled by Native Americans of 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. The county territory was defined as being west of longitude 113° 20' and south of the Bill Williams River. Its original boundaries remained the same until 1982, when 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.

Geography

According to the U.S. Census Bureau, the county has a total area of 5,519 square miles (14,290 km2), of which 5,514 square miles (14,280 km2) is land and 5.1 square miles (13 km2) (0.09%) is water. The lowest point in the state of Arizona is located on the Colorado River in 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 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 and the Tule Mountains.

Adjacent counties and municipalities

Major highways

  • I-8 (AZ).svg Interstate 8
  • US 95.svg U.S. Route 95
  • Arizona 195.svg Arizona State Route 195
  • Arizona 280.svg State Route 280

National protected areas

  • Cabeza Prieta National Wildlife Refuge (part)
  • Imperial National Wildlife Refuge (part)
  • Kofa National Wildlife Refuge (part)

Climate

Climate data for Yuma, Arizona (Yuma Int'l), 1981–2010 normals, extremes 1878–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 88
(31.1)
97
(36.1)
102
(38.9)
107
(41.7)
120
(48.9)
122
(50)
124
(51.1)
120
(48.9)
123
(50.6)
112
(44.4)
98
(36.7)
91
(32.8)
124
(51.1)
Average high °F (°C) 69.6
(20.89)
73.8
(23.22)
79.9
(26.61)
86.4
(30.22)
95.3
(35.17)
103.5
(39.72)
106.8
(41.56)
106.2
(41.22)
101.3
(38.5)
89.9
(32.17)
77.5
(25.28)
68.3
(20.17)
88.2
(31.22)
Average low °F (°C) 47.6
(8.67)
50.1
(10.06)
54.4
(12.44)
59.6
(15.33)
67.3
(19.61)
74.6
(23.67)
82.1
(27.83)
82.3
(27.94)
76.5
(24.72)
65.0
(18.33)
53.9
(12.17)
46.6
(8.11)
63.3
(17.39)
Record low °F (°C) 22
(-5.6)
25
(-3.9)
31
(-0.6)
38
(3.3)
39
(3.9)
50
(10)
61
(16.1)
58
(14.4)
50
(10)
35
(1.7)
29
(-1.7)
22
(-5.6)
22
(-5.6)
Precipitation inches (mm) 0.36
(9.1)
0.33
(8.4)
0.34
(8.6)
0.12
(3)
0.03
(0.8)
0.01
(0.3)
0.26
(6.6)
0.52
(13.2)
0.53
(13.5)
0.21
(5.3)
0.20
(5.1)
0.45
(11.4)
3.36
(85.3)
Avg. precipitation days (≥ 0.01 in) 2.3 2.0 1.8 .8 .4 .2 .9 2.3 1.2 1.1 1.0 2.1 16.2
Sunshine hours 268.4 270.8 335.5 365.5 407.4 415.4 392.6 375.6 341.7 319.6 270.1 252.7 4,015.3
Source: NOAA

Demographics

Historical population
Census Pop.
1870 1,621
1880 3,215 98.3%
1890 2,671 −16.9%
1900 4,145 55.2%
1910 7,733 86.6%
1920 14,904 92.7%
1930 17,816 19.5%
1940 19,326 8.5%
1950 28,006 44.9%
1960 46,235 65.1%
1970 60,827 31.6%
1980 90,554 48.9%
1990 106,895 18.0%
2000 160,026 49.7%
2010 195,751 22.3%
Est. 2015 204,275 4.4%
U.S. Decennial Census
1790–1960 1900–1990
1990–2000 2010–2015

2000 census

As of the 2000 census, there were 160,026 people, 53,848 households, and 41,678 families residing in the county. The population density was 29 people per square mile (11/km²). There were 74,140 housing units at an average density of 13 per square mile (5/km²). The racial makeup of the county was 68.3% White, 2.2% Black or African American, 1.6% Native American, 0.9% Asian, 0.1% Pacific Islander, 23.6% from other races, and 3.2% from two or more races. 50.5% of the population were Hispanic or Latino of any race. 43.7% reported speaking Spanish at home [1].

There were 53,848 households out of which 36.9% had children under the age of 18 living with them, 62.3% were 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 102.00 males. For every 100 females age 18 and over, there were 101.10 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.

2010 census

As of the 2010 United States Census, there were 195,751 people, 64,767 households, and 48,976 families residing in the county. The population density was 35.5 inhabitants per square mile (13.7/km2). There were 87,850 housing units at an average density of 15.9 per square mile (6.1/km2). 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. In terms of ancestry, 10.6% were German, 7.4% were English, 6.9% were Irish, and 3.2% were American.

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.

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.

Communities

Yuma County Incorporated and Unincorporated areas
Map of Yuma County showing incorporated and unincorporated areas as well as Indian reservations in the county.

Cities

Town

Census-designated places

Other unincorporated communities

Ghost towns

Indian reservations

County population ranking

The population ranking of the following table is based on the 2010 census of Yuma County.

county seat

Rank City/Town/etc. Population (2010 Census) Municipal type Incorporated
1 Yuma 93,064 City 1914
2 Fortuna Foothills 26,265 CDP
3 San Luis 25,505 City 1979
4 Somerton 14,287 City 1918
5 Avenue B and C 4,176 CDP
6 Wellton 2,882 Town 1970
7 Donovan Estates 1,508 CDP
8 Martinez Lake 798 CDP
9 Gadsden 678 CDP
10 Rancho Mesa Verde 625 CDP
11 Tacna 602 CDP
12 Orange Grove Mobile Manor 594 CDP
13 El Prado Estates 504 CDP
14 Dateland 416 CDP
15 Wall Lane 415 CDP
16 Drysdale 272 CDP
17 Wellton Hills 258 CDP
18 Padre Ranchitos 171 CDP
19 Buckshot 153 CDP
20 Aztec 47 CDP

Yuma County, Arizona Facts for Kids. Kiddle Encyclopedia.