Allegan County Flag

Allegan County

State:
Michigan
County Seat:
Allegan

Allegan County's estimated 2026 population is 123,809 with a growth rate of 0.5% in the past year according to the most recent United States census data. Allegan County is the 18th largest county in Michigan. The 2010 population was 111,521 and has seen a growth of 11.02% since that time.

123,809
Total Population
150
Population Density (mi²)
18
Population Rank (State)
621 0.5%
Annual Population Growth

Allegan County Population

Demographics

Economics and Income Statistics