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Yuma County


Facts & Information

The Cities and communities of Yuma County, Arizona*









San Luis



The Foothills


Yuma (County Seat)

*This list of cities may not be complete

If you have information about any of these unlinked communities, please send it to us and we will add a page for that community.

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Information & Facts about Yuma County, Arizona

All of Arizona is on the Mountain Standard Time - year round. When other parts of the country go on daylight savings time, Arizona remains on standard time.

Yuma County Website
Phone: 928-329-2104
Fax: 928-329-2001
General Information:

County Courthouse
198 S. Main Street
Yuma, AZ 85364
Phone: 928-329-2104
FAX: 928-329-2001


Yuma County history page

The following paraphrased excerpts are taken from the above mentioned history page:

"Yuma County is one of four original counties designated by the first Territorial Legislature. It maintained its original boundaries until 1983 when voters decided to split Yuma County into LaPaz County in the north and a new "Yuma County" in the south.


At 5,522 square miles, Yuma County is larger than the state of Connecticut.


Much of Yuma County's 5,522 square miles is desert land accented by rugged mountains. Several river valley regions, however, contain an abundance of arable land which is irrigated with water from the Colorado River.

These valley areas have some of the most fertile soils in the world, having received silt and mineral deposits from Colorado and Gila River floods until the rivers were tamed by an intricate series of dams and canals.

Elevation: 138 (at city of Yuma, the county seat)


Farming, cattle raising, tourism, and two military bases, US Marine Corp Air Station (MCAS) and US Army Yuma Proving Ground (YPG) are Yuma County's principal industries.


Yuma County is in southwest Arizona. It is bordered on the west by California, on the south by Mexico, on the east by both Maricopa and Pima Counties, and on the north and northwest by La Paz County.


1990 - 106,895
1996 - 125,142
2000 - 135,000

During the winter, the population increases by about 80,000 due to the Winter Visitors who are usually referred to as "Snowbirds".

Weather & Climate

Average high temperature: 87.3 degrees Fahrenheit
Average low temperature: 53.5 degrees Fahrenheit
Average temperature: 75.2
Average yearly rainfall: 2.94 inches
Per cent of Sunshine each year: 90%
Relative Humidity: 32% (summer)


Yuma County School Superintendent website


Yuma County Library District
350 Third Avenue
Yuma, AZ 85364
Phone: (928) 782-1871
The Yuma County Library District serves as your center for information, community enrichment, recreational reading, and lifelong learning

Organizations and Groups:

Yuma Historical Society
Phone: 928-782-1841
Fax: 1-928-783-0680

Yuma Convention Bureau.
We put out our welcome mat every day. Mild winters and temperate summers make Yuma an ideal destination for all your vacation needs. We offer a variety of recreational activities and cultural attractions. Enjoy our soothing waters or lush golf courses, our diverse selection of restaurants & shopping boutiques and our natural wildlife and breathtaking scenery.
Phone: 928-783-0071
Fax: 1-928-783-1897

Yuma County Chamber of Commerce
180 W. 1st St., Suite A
Yuma Arizona 85364
Phone: (928) 782-2567
Fax: (928) 343-0038

Attractions and more:

Marine Corps Air Station (MCAS)
Public Affairs: 928-269-2275

Yuma Proving Grounds (YPG)
Public Affairs: 928-328-6033
U.S. Army Yuma Proving Ground is a unique national defense asset. At over 1300 square miles in size, larger than the state of Rhode Island, Yuma Proving Ground's research and development facilities are capable of testing nearly everything in the ground combat arsenal -- realistically, accurately and safely. Last year, over 167,000 rounds were fired, 36,000 parachute drops took place and nearly 4000 air sorties were flown at the installation.

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Last update: 28 February 2011 at 11:08 pm

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