Richland County, Ohio

Richland County, Ohio
Richland County Courthouse
Location within the U.S. state of Ohio
Coordinates: 40°47′N 82°32′W / 40.78°N 82.54°W / 40.78; -82.54
Country United States
State Ohio
FoundedMarch 1, 1813
Named aftertheir fertile soil
SeatMansfield
Largest cityMansfield
Area
 • Total
500 sq mi (1,300 km2)
 • Land495 sq mi (1,280 km2)
 • Water4.8 sq mi (12 km2)  1.0%
Population
 (2020)
 • Total
124,936
 • Density250/sq mi (97/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district4th
Websitewww.richlandcountyoh.gov

Richland County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 124,936. Its county seat is Mansfield. The county was created in 1808 and later organized in 1813. It is named for the fertile soil found there. Richland County is included in the Mansfield, OH Metropolitan Statistical Area as well as the Mansfield-Ashland-Bucyrus, OH Combined Statistical Area. The county is one of the six Metropolitan Statistical Areas that make up Northeast Ohio.