Welcome!

Bonneville County IDGenWeb is a free genealogical site about the history of the county. We hope you find helpful clues for your research of Bonneville county ancestors.

What's New at Bonneville County IDGenWeb since your last visit
Search Bonneville County IDGenWeb for a specific name

Are you familiar with the area? Do you have a family tree connection to the area? Please consider contributing your pieces of Bonneville County family history. Corrections, updates, and additions to this site are always welcome. Our combined efforts can make this a great site for all who visit!

County Coordinator: YOU? Bonneville County IDGenWeb is AVAILABLE FOR ADOPTION.
If you are interested in helping, please don't hesitate to contact us.

Temporary County Coordinator: Norma Hass normahass01@gmail.com

State Coordinator: Kerry Hairston kerry.hairston@gmail.com

COUNTY FORMATION

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.