
Isabella County
- State:
- Michigan
- County Seat:
- Mount Pleasant
Isabella County's estimated 2025 population is 63,622 with a growth rate of -0.39% in the past year according to the most recent United States census data. Isabella County is the 32nd largest county in Michigan. The 2010 population was 70,297 and has seen a growth of -9.5% since that time.