List of counties in Arizona

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There are 15 counties in the U.S. state of Arizona.[1] Four counties (Mohave, Pima, Yavapai and Yuma) were created in 1864 following the organization of the Arizona Territory in 1862. The now defunct Pah-Ute County was split from Mohave County in 1865, but merged back in 1871. All but La Paz County were created by the time Arizona was granted statehood in 1912.[2]

The names of many of the counties pay tribute to the state's Native American heritage. Nine of the fifteen counties are named after various native groups that are resident in parts of what is now Arizona. Three of the other counties have Spanish names from the language of the early Hispanic explorers of Arizona: La Paz County, Santa Cruz County, and Pinal County. Another county, Graham County, is named for a physical feature, Mount Graham, with the final county, Greenlee County, being named after one of the state's early pioneers.[3]

Arizona's postal abbreviation is AZ and its FIPS code is 04.

Alphabetical listing[edit]

FIPS code
County seat
Formed from
Apache County001St. Johns1879Part of Yavapai County.The Apache Native American people, who are resident in northeastern Arizona.69,98011,218 sq mi
(29,054 km2)
State map highlighting Apache County
Cochise County003Bisbee1881Part of Pima County.Cochise, the Apache Native American leader.127,8666,219 sq mi
(16,107 km2)
State map highlighting Cochise County
Coconino County005Flagstaff1891Part of Yavapai County.Coconino Native American people, a Hopi designation for Havasupai and Yavapai people.134,42118,661 sq mi
(48,332 km2)
State map highlighting Coconino County
Gila County007Globe1881Parts of Maricopa County and Pinal County.Gila River, a river that flows through Arizona, whose name comes from a Pima Indian word.51,9944,796 sq mi
(12,422 km2)
State map highlighting Gila County
Graham County009Safford1881Parts of Apache County and Pima County.Mount Graham, a mountain located in Arizona's Pinaleno Mountains.34,7694,641 sq mi
(12,020 km2)
State map highlighting Graham County
Greenlee County011Clifton1909Part of Graham County.Mason Greenlee, a pioneer prospector in the area who died in 1903.[6]7,7541,848 sq mi
(4,786 km2)
State map highlighting Greenlee County
La Paz County012Parker1983Part of Yuma County.La Paz, Arizona, a historic boomtown on the Colorado River. La paz means the peace in Spanish.20,1724,513 sq mi
(11,689 km2)
State map highlighting La Paz County
Maricopa County013Phoenix1871Parts of Pima County and Yavapai County.Maricopa Native American people.3,990,1819,224 sq mi
(23,890 km2)
State map highlighting Maricopa County
Mohave County015Kingman1864One of the original 4 counties.Mohave Indians, one of the Yuma tribes.194,94413,470 sq mi
(34,887 km2)
State map highlighting Mohave County
Navajo County017Holbrook1895Part of Apache County.Navajo Native American people.111,2739,959 sq mi
(25,794 km2)
State map highlighting Navajo County
Pima County019Tucson1864One of the original 4 counties.Pima Native American people, called in their own language Akimel O'odham (river people).1,003,2359,189 sq mi
(23,799 km2)
State map highlighting Pima County
Pinal County021Florence1875Parts of Maricopa and Pima counties.Pinal Mountains (named from the Spanish for stand of pines) and the Pinal Indian people (a band of Coyotero Apaches) who lived there.324,9625,374 sq mi
(13,919 km2)
State map highlighting Pinal County
Santa Cruz County023Nogales1899Parts of Cochise and Pima counties.Santa Cruz River, a small river that flows through Arizona.42,8451,238 sq mi
(3,206 km2)
State map highlighting Santa Cruz County
Yavapai County025Prescott1864One of the original 4 counties.Yavapai Native American people, who are from central Arizona212,6358,128 sq mi
(21,051 km2)
State map highlighting Yavapai County
Yuma County027Yuma1864One of the original 4 counties.Yuma Indians, today called the Quechan.190,5575,519 sq mi
(14,294 km2)
State map highlighting Yuma County

Defunct counties[edit]

See also[edit]


  1. ^ a b c d e "Find A County". National Association of Counties. Retrieved 2012-04-07. 
  2. ^ a b Adams, Ward R. (1997). History of Arizona. Higginson Book Company. ISBN 0-8328-7044-7. 
  3. ^ a b Kane, Joseph and Aiken, Charles (2004). The American Counties: Origins of County Names, Dates of Creation, and Population Data, 1950-2000. Scarecrow Press. ISBN 0-8108-5036-2. 
  4. ^ "EPA County FIPS Code Listing". EPA. Retrieved 2007-04-09. 
  5. ^ a b "Arizona QuickFacts". U.S. Census Bureau. Retrieved 2007-07-17. [dead link] (2000 Census)
  6. ^ "History of Greenlee County: Mason Greenlee". Greenlee County Government. Archived from the original on 2007-05-02. Retrieved 2007-07-20.