Flathead County Flag

Flathead County

State:
Montana
County Seat:
Kalispell

Flathead County's estimated 2025 population is 117,267 with a growth rate of 1.55% in the past year according to the most recent United States census data. Flathead County is the 4th largest county in Montana. The 2010 population was 90,863 and has seen a growth of 29.06% since that time.

117,267
Total Population
23
Population Density (mi²)
4
Population Rank (State)
1.8K 1.55%
Annual Population Growth

Flathead County Population

Demographics

Economics and Income Statistics