
Knox County
- State:
- Ohio
- County Seat:
- Mount Vernon
Knox County's estimated 2025 population is 63,568 with a growth rate of 0.2% in the past year according to the most recent United States census data. Knox County is the 40th largest county in Ohio. The 2010 population was 61,087 and has seen a growth of 4.06% since that time.