Bonneville County IDGenWeb is a free genealogical site about the history
of the county. We hope you find helpful clues for your research of
ancestors and relatives of Bonneville county.
Please consider contributing your pieces of Bonneville county family history. Corrections, updates, and additions to this site are always welcome. Our combined efforts can keep this a great site for all who visit!
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Bonneville County was established February 7, 1911, from the north and east
parts of Bingham county. It was named in honor of Captain B. L. E. Bonneville,
of the U. S. Army, who explored the Snake River area in the 1830s.
A
settlement began at the site of the Eagle Rock ferry on the Snake River in 1864,
this settlement was renamed Idaho Falls in 1891. Idaho Falls is the County Seat.
Bonneville County covers 1,897 square miles. More than half the county is in
the Targhee and Caribou National Forests. The Gray's Lake National Wildlife
Refuge is in Bonneville County. Major industries include farming and the Idaho
National Engineering Laboratory under the direction of The U.S. Department of
Energy.
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