Mansfield
- County:
- Richland County
- County Seat:
- Yes
- Area (mi²):
- 30.874
- State:
- Ohio
Mansfield is a city located in Richland County, Ohio. Mansfield has a 2026 population of 47,593. It is also the county seat of Richland County. Mansfield is currently declining at a rate of -0.17% annually but its population has increased by 0.14% since the most recent census, which recorded a population of 47,525 in 2020.