Yuma County is a county in the southwestern corner of the U.S. state of Arizona. As of the 2020 census, its population was 203,881. The county seat is Yuma.
Yuma County includes the Yuma, Arizona 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 Arizona's largest majority-Hispanic county.
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.
Economy
This county is the highest crop producer in the state by dollar value per year. 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. Overall this is the second (to Maricopa) producing county for all agricultural products at $1,143,068,000 per year and for organic production. Almost all of the dates (Phoenix dactylifera) in the state are grown here, about worth $35 million per year. This is the second highest citrus producer behind Maricopa, a distant second in grapefruit, limes, and oranges but producing far more lemons. Some olives, clingstone peaches, and plums are grown here. Yuma County produces almost all of the vegetable seed grown in the state. The average farmer age is the lowest in the state, at 56.6 years.
During the winter agricultural season from November to March, some 40,000 Mexican workers cross the border daily to work in United States fields. The area is watered by the Colorado River, and the sector supplies a large part of the US leafy vegetables. 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 . Fruits brought $62,499,000, also first in the state, 56th out of >3000 counties in the country. Jojoba (Simmondsia chinensis) is a valuable native crop here. From here it has also been introduced into cultivation in other countries.
The Sweetpotato Whitefly (Silverleaf Whitefly, Bemisia tabaci) is a common pest here. The county is planted with large extents of several crops which serve as hosts.
Date trees (Phoenix dactylifera) were planted here in the 2010s. In this county, plantations suffer from the Carob Moth (Ectomyelois ceratoniae) and the Banks Grass Mite (Oligonychus pratensis).
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..."
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. In 2015, however, only 6,000 people were apprehended, as the border was fortified and augmented. The number of undocumented immigrants also declined with slumps in the US economy.
The anticipates many agricultural jobs in the county will soon transition to robotics.
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. 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.