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Counties

Yavapai

County Seat: PrescottFounded: 1864Area: 8,124 square milesPopulation: 211,033 (2010)Other Major Cities: Camp Verde, Chino...
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Counties

Santa Cruz

County Seat: NogalesFounded: 1899Area: 1,237 square milesPopulation: 47,420 (2010)Other Major Cities: Patagonia, Sonoita,...
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Counties

Pinal

County Seat: FlorenceFounded: 1875Area: 5,366 square milesPopulation: 375,770 (2010)Other Major Cities: Apache Junction,...
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Counties

Pima

County Seat: TucsonFounded: 1864Area: 9,187 square milesPopulation: 980,263 (2010)Other Major Cities: Ajo, Green Valley,...
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Counties

Navajo

County Seat: HolbrookFounded: 1895Area: 9,950 square milesPopulation: 107,449 (2010)Other Major Cities: Heber, Kayenta,...
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Counties

Mohave

County Seat: KingmanFounded: 1864Area: 13,311 square milesPopulation: 200,186 (2010)Other Major Cities: Bullhead City, Lake...
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Counties

Maricopa

County Seat: PhoenixFounded: 1871Area: 9,200 square milesPopulation: 3,817,117 (2010)Other Major Cities: Gila Bend, Mesa,...
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Counties

La Paz

County Seat: ParkerFounded: 1983Area: 4,500 square milesPopulation: 20,489 (2010)Other Major City: QuartzsiteGeographic...