County Contacts

County Clerk

200 West Front Street
Boise, Idaho 83702

Phone: (208) 287-6840
Fax: (208) 287-6849

Cities in Ada County

County Seat: Boise

(Incorporated cities shown only.)

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Land area: 1,060 square miles

Established December 22, 1864 with its county seat at Boise. Named for Ada Riggs, the first white child born in the area and the daughter of H. C. Riggs, one of the founders of Boise and a member of the Idaho Territorial Legislature. Boise became the capital of Idaho in 1865.

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