Union County, Ohio
Union County | |
|---|---|
Union County Courthouse | |
Location within the U.S. state of Ohio | |
Ohio's location within the U.S. | |
| Coordinates: 40°19′N 83°22′W / 40.31°N 83.37°W | |
| Country | United States |
| State | Ohio |
| Founded | April 1, 1820 |
| Named after | formed from the union of parts of surrounding counties |
| Seat | Marysville |
| Largest city | Marysville |
| Area | |
• Total | 437 sq mi (1,130 km2) |
| • Land | 432 sq mi (1,120 km2) |
| • Water | 5.1 sq mi (13 km2) 1.2% |
| Population (2020) | |
• Total | 62,784 |
| • Density | 140/sq mi (50/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 4th |
| Website | www |
Union County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 62,784. Its county seat is Marysville. Its name is reflective of its origins, being the union of portions of Franklin, Delaware, Madison, and Logan counties. Union County is part of the Columbus, Ohio Metropolitan Statistical Area.