Marion County
Also known as Marion County, Ohio, Marion County, OH
county in Ohio, United States
Key facts
- Country
- United States
- State
- Ohio
- Founded
- February 20, 1820
- Named after
- Francis Marion
- Seat
- Marion
- Largest city
- Marion
- Total
- 404 sq mi (1,050 km )
- Land
- 404 sq mi (1,050 km )
- Water
- 0.4 sq mi (1.0 km ) 0.1%
- Estimate 2025
- 65,115
- Density
- 162/sq mi (62.5/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
~8 min read
Article
Marion County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,359. Its county seat is Marion. The county was erected by the state of Ohio on February 20, 1820 and later reorganized in 1824. It is named for General Francis "Swamp Fox" Marion, a South Carolinian officer in the Revolutionary War. Marion County comprises the Marion, OH Micropolitan Statistical Area, which is also included in the Columbus-Marion-Zanesville, OH Combined Statistical Area.
Geography