Mercer County | |
|---|---|
 Mercer County courthouse | |
 Flag  Seal | |
 Location within the U.S. state of Ohio | |
 Ohio's location within the U.S. | |
| Coordinates: 40°32′N 84°38′W / 40.54°N 84.63°W | |
| Country |  United States |
| State |  Ohio |
| Founded | January 2, 1824 |
| Named for | Hugh Mercer |
| Seat | Celina |
| Largest city | Celina |
| Area | |
| • Total | 473 sq mi (1,230 km2) |
| • Land | 462 sq mi (1,200 km2) |
| • Water | 11 sq mi (30 km2) 2.3% |
| Population (2020) | |
| • Total | 42,528  |
| • Density | 90/sq mi (30/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 5th |
| Website | www |
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Mercer County is located in the U.S. state of Ohio. As of the 2020 census, the population was 42,528.[1] Its county seat is Celina.[2] The county was created in 1820 and later organized in 1824.[3] It is named for Hugh Mercer, an officer in the American Revolutionary War.[4]
Mercer County comprises the Celina, Ohio Micropolitan Statistical Area
- ^ 2020 census
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ "Ohio: Individual County Chronologies". Ohio Atlas of Historical County Boundaries. The Newberry Library. 2007. Archived from the original on April 6, 2016. Retrieved February 14, 2015.
- ^ "Mercer County data". Ohio State University Extension Data Center. Retrieved April 28, 2007.[dead link]