Fergus County Flag

Fergus County

State:
Montana
County Seat:
Lewistown

Fergus County's estimated 2026 population is 11,954 with a growth rate of 0.39% in the past year according to the most recent United States census data. Fergus County is the 17th largest county in Montana. The 2010 population was 11,585 and has seen a growth of 3.19% since that time.

11,954
Total Population
3
Population Density (mi²)
17
Population Rank (State)
46 0.39%
Annual Population Growth

Fergus County Population

Demographics

Economics and Income Statistics