Bonneville County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 123,964, making it the fourth-most populous county in Idaho and the most populous in eastern Idaho. Its county seat and largest city is... Wikipedia
Cities: Idaho Falls, Ammon, Swan Valley, and more
Population: 129,496 (2022)
Area: 1,901 mi²
County seat: Idaho Falls
Congressional district: 2nd
Named for: Benjamin Bonneville