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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.
County Seat: Idaho Falls
Land Area: 1,897 square miles.
County Clerk County Courthouse Idaho Falls, ID 83402-3582 Phone: (208) 529-1350 ext. 1355 Fax: (208) 529-1353
