Marion County | |
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![]() Location within the U.S. state of Ohio | |
![]() Ohio's location within the U.S. | |
Coordinates: 40°35′N 83°10′W / 40.59°N 83.16°W | |
Country | ![]() |
State | ![]() |
Founded | February 20, 1820 |
Named for | Francis Marion |
Seat | Marion |
Largest city | Marion |
Area | |
• Total | 404 sq mi (1,050 km2) |
• Land | 404 sq mi (1,050 km2) |
• Water | 0.4 sq mi (1 km2) 0.1% |
Population (2020) | |
• Total | 65,359 |
• Density | 160/sq mi (62/km2) |
Time zone | UTC−5 (Eastern) |
• Summer (DST) | UTC−4 (EDT) |
Congressional district | 4th |
Website | www |
Marion County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,359.[1] Its county seat is Marion.[2] The county was erected by the state of Ohio on February 20, 1820 and later reorganized in 1824.[3] It is named for General Francis "The Swamp Fox" Marion, a South Carolinian officer in the Revolutionary War.[4] Marion County comprises the Marion, OH Micropolitan Statistical Area, which is also included in the Columbus-Marion-Zanesville, OH Combined Statistical Area.