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Please add profiles for those who were born, lived or died in Ada County, Idaho.

Official Website

Ada County was created by the Idaho Territorial Legislature on December 22, 1864. It is named for Ada Riggs, the daughter of H.C. Riggs, a member of the legislature; he established the county and was a co-founder of Boise.

Ada County is along the historic Oregon Trail. Thousands of pioneers passed through here between 1840 to1860 on their way to Oregon.

Adjacent Counties

Cities, Counties, Towns and Communities

  • Avimor
  • Blacks Creek
  • Boise (County Seat, State Capital)
  • Eagle
  • Garden City
  • Hidden Springs
  • Kuna
  • Meridian
  • Mora
  • Orchard
  • Owyhee
  • Pleasant Valley
  • Regina
  • Sonna
  • Star



Boise National Forest (part)

Snake River Birds of Prey National Conservation Area (part)

National Register of Historic Places

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