Idaho County Flag

Idaho County

State:
Idaho
County Seat:
Grangeville

Idaho County's estimated 2025 population is 18,396 with a growth rate of 1.39% in the past year according to the most recent United States census data. Idaho County is the 20th largest county in Idaho. The 2010 population was 16,311 and has seen a growth of 12.78% since that time.

18,396
Total Population
2
Population Density (mi²)
20
Population Rank (State)
253 1.39%
Annual Population Growth

Idaho County Population

Demographics

Economics and Income Statistics