County Contacts

County Clerk

County Courthouse
Idaho Falls, Idaho 83402-3582

Phone: (208) 529-1350
Fax: (208) 529-1353

Cities in Bonneville County

County Seat: Idaho Falls

(Incorporated cities shown only.)

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Land area: 1,897 square miles

Established February 7, 1911 by the state legislature from the north and east parts of Bingham County. Named for Captain B. L. E. Bonneville, of the U. S. Army, who explored throughout the Snake River area in the 1830s. A settlement developed at the site of 1864, this settlement was known as Idaho Falls after 1891.

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