Hamilton County | |
|---|---|
County | |
 | |
 Flag  Seal  Logo | |
 Location within the U.S. state of Ohio | |
 Ohio's location within the U.S. | |
| Coordinates: 39°12′N 84°32′W / 39.2°N 84.54°W | |
| Country |  United States |
| State |  Ohio |
| Founded | January 2, 1790[1] |
| Named for | Alexander Hamilton |
| Seat | Cincinnati |
| Largest city | Cincinnati |
| Area | |
• Total | 413 sq mi (1,070 km2) |
| • Land | 406 sq mi (1,050 km2) |
| • Water | 6.7 sq mi (17 km2) 1.6% |
| Population (2020) | |
• Total | 830,639 |
• Estimate (2023) | 827,058  |
| • Density | 2,000/sq mi (780/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional districts | 1st, 8th |
| Website | hamilton-co |
Hamilton County is located in the southwestern corner of the U.S. state of Ohio. As of the 2020 census, the population was 830,639,[2] making it the third-most populous county in Ohio. The county seat and most populous city is Cincinnati.[3] The county is named for the first Secretary of the Treasury, Alexander Hamilton.[4] Hamilton County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area.
- ^ "Ohio County Profiles: Hamilton County" (PDF). Ohio Department of Development. Archived from the original (PDF) on June 21, 2007. Retrieved April 28, 2007.
- ^ "U.S. Census Bureau QuickFacts: Hamilton County, Ohio". www.census.gov. United States Census Bureau. Retrieved April 1, 2022.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "Hamilton County data". Ohio State University Extension Data Center. Archived from the original on December 3, 2007. Retrieved April 28, 2007.