Bonneville County Flag

Bonneville County

State:
Idaho
County Seat:
Idaho Falls

Bonneville County's estimated 2026 population is 137,982 with a growth rate of 1.6% in the past year according to the most recent United States census data. Bonneville County is the 4th largest county in Idaho. The 2010 population was 104,682 and has seen a growth of 31.81% since that time.

137,982
Total Population
74
Population Density (mi²)
4
Population Rank (State)
2.2K 1.6%
Annual Population Growth

Bonneville County Population

Demographics

Economics and Income Statistics