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List of Arizona Counties and County Seats





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The U.S. state of Arizona has 15 counties. Explore list of Arizona Counties and County Seats in alphabetical order populations, areas and the date of formation.

List of Arizona Counties and County Seat

CountyCounty SeatPopulation (2011)Area Formed
Apache CountySt. Johns69,98011,218 sq mi1879
Cochise CountyBisbee127,8666,219 sq mi1881
Coconino CountyFlagstaff134,42118,661 sq mi1891
Gila CountyGlobe51,9944,796 sq mi1881
Graham CountySafford34,7694,641 sq mi1881
Greenlee CountyClifton7,7541,848 sq mi1909
La Paz CountyParker20,1724,513 sq mi1983
Maricopa CountyPhoenix3,990,1819,224 sq mi1871
Mohave CountyKingman194,94413,470 sq mi1864
Navajo CountyHolbrook111,2739,959 sq mi1895
Pima CountyTucson1,003,2359,189 sq mi1864
Pinal CountyFlorence324,9625,374 sq mi1875
Santa Cruz CountyNogales42,8451,238 sq mi1899
Yavapai CountyPrescott212,6358,128 sq mi1864
Yuma CountyYuma190,5575,519 sq mi1864