Arizona County Information:

  • Apache County
    • Date Created:
      February 24, 1879 from Yavapai County
    • Named for:
      the native Apache Indian tribes
    • Location:
      Northeast corner of the state, bordering New Mexico and Utah
    • Neighboring Counties:
      Navaho, Graham, and Greenlee Counties, AZ. San Juan, Cibola, McKinley, and Catron Counties, NM, San Juan County Utah.
    • County Seat:
      St. Johns
  • Cochise County
    • Location:
      1881 from Pima County
    • Named for:
      Chiricahua Apache leader "Cochise"
    • Location:
      Southeastern corner of Arizona
    • Neighboring Counties:
      Santa Cruz, Graham, Pima, and Greenlee Counties, AZ, Hidalgo County, NM, and Mexico to the south
    • County Seat:
      Bisbee
  • Coconino County
    • Date Created:
      1891 from Yavapai County
    • Named for:
      Indian term meaning "little water"
    • Location:
      North central Arizona
    • Neighboring Counties:
      Mohave, Yavapai, Gila, and Navajo Counties, AZ, Kane and San Juan Counties, UT
    • County Seat:
      Flagstaff
  • Gila County
    • Date Created:
      1881 from parts of Maricopa and Pinal Counties
    • Named for:
      The Gila River which forms part of the southern border
    • Location:
      Central Arizona
    • Neighboring Counties:
      Coconino, Yavapai, Maricopa, Pinal, Graham, and Navajo Counties
    • County Seat:
      Globe
  • Graham County
    • Location:
      1881 from Apache and Pima Counties
    • Named for:
      Mt. Graham
    • Location:
      Southeast Arizona
    • Neighboring Counties:
      Gila, Pinal, Pima, Cochise, Greenlee, Apache, and Navajo Counties
    • County Seat:
      Safford
  • Greenlee County
    • Location:
      1909 from Graham County
    • Named for:
      M. Greenlee, an early settler
    • Location:
      Southeast Arizona
    • Neighboring Counties:
      Apache, Graham, and Cochise Counties, Arizona, Hidalgo, Grant, and Catron Counties, New Mexico
    • County Seat:
      lClifton
  • La Paz County
    • Location:
      1983 from Yuma County
    • Named for:
      the first county seat of Yuma County
    • Location:
      Southwest Arizona
    • Neighboring Counties:
      Mohave, Yavapai, Maricopa, and Yuma Counties, Arizona, San Bernardino, Riverside, and Imperial Counties, California
    • County Seat:
      Parker
  • Maricopa County
    • Location:
      1871 from Pima, Yuma, Mohave, and Yavapai Counties
    • Named for: An indigenous Arizona Indian tribe
    • Location:
      Southwest Arizona
    • Neighboring Counties: Yavapai, La Paz, Yuma, Pima, Pinal, and Gila Counties, Arizona
    • County Seat: Phoenix
  • Mohave County
    • Location:
      1864 as one of Arizona's four original counties
    • Named for: An indigenous Arizona Indian tribe
    • Location:
      Northwest corner of Arizona
    • Neighboring Counties: Coconino, Yavapai, and La Paz Counties, Arizona, and San Bernardino County, California
    • County Seat: Kingman
  • Navajo County
    • Location:
      1895 from  Apache County
    • Named for:  An indigenous Arizona Indian tribe
    • Location:
      Northeast to central Arizona
    • Neighboring Counties: Coconino, Gila, and Graham Counties, Arizona, and San Juan County, California
    • County Seat: Holbrook 
  • Pima County
    • Location:
      1870 as one of Arizona's four original counties
    • Named for: the Spanish designation of the location-Pimeria Alta ("Upper Pima")
    • Location:
      Southern central border of Arizona
    • Neighboring Counties: Yuma, Maricopa, Pinal, Santa Cruz, Graham, and Cochise Counties, Arizona, and Mexico to the south
    • County Seat: Tucson
  • Pinal County
    • Location:
      1875 from Maricopa and Pima Counties
    • Named for: the Pinal Apaches,  an indigenous Arizona Indian tribe
    • Location:
      Gila, Graham, Maricopa, Pima
    • Neighboring Counties:
    • County Seat: Florence
  • Santa Cruz County
    • Location:
      1899 from Pima and Cochise Counties
    • Named for: the Santa Cruz River
    • Location:
      South central Arizona
    • Neighboring Counties: Maricopa, Pima, Graham, and Gila Counties, Arizona
    • County Seat: Nogales
  • Yavapai County
    • Location:
      1864 as one of Arizona's four original counties
    • Named for: An indigenous Arizona Indian tribe
    • Location:
      Central Arizona
    • Neighboring Counties: Coconino, Mohave, La Paz, Maricopa, and Gila Counties, Arizona
    • County Seat:
      Prescott
  • Yuma County
    • Location:

      1864 as one of Arizona's four original counties
    • Named for:
      An indigenous Arizona Indian tribe
    • Location:

      Southwest corner of Arizona
    • Neighboring Counties:
      La Paz, Maricopa, and Pima Counties, Arizona, Imperial County, California, and Mexico to the south
    • County Seat:
      Yuma