
Barnesville
- County:
- Belmont County
- County Seat:
- No
- Area (mi²):
- 2.05
- State:
- Ohio
Barnesville is a village located in Belmont County, Ohio. Barnesville has a 2025 population of 3,847. Barnesville is currently declining at a rate of -0.77% annually and its population has decreased by -3.8% since the most recent census, which recorded a population of 3,999 in 2020.
The average household income in Barnesville is $56,282 with a poverty rate of 20.09%. The median age in Barnesville is 39.7 years: 43.1 years for males, and 39.4 years for females.