
Logan County
- State:
- Ohio
- County Seat:
- Bellefontaine
Logan County's estimated 2025 population is 46,047 with a growth rate of -0.01% in the past year according to the most recent United States census data. Logan County is the 53rd largest county in Ohio. The 2010 population was 45,743 and has seen a growth of 0.66% since that time.