
Ross County
- State:
- Ohio
- County Seat:
- Chillicothe
Ross County's estimated 2025 population is 76,487 with a growth rate of -0.01% in the past year according to the most recent United States census data. Ross County is the 32nd largest county in Ohio. The 2010 population was 78,102 and has seen a growth of -2.07% since that time.