Butler County, Ohio
Butler County, Ohio | |
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Flag Seal | |
Location within the U.S. state of Ohio | |
| Coordinates: 39°26′N 84°35′W / 39.44°N 84.58°W | |
| Country | United States |
| State | Ohio |
| Founded | May 1, 1803 |
| Named after | General Richard Butler |
| Seat | Hamilton |
| Largest city | Hamilton |
| Area | |
• Total | 470 sq mi (1,200 km2) |
| • Land | 467 sq mi (1,210 km2) |
| • Water | 3.1 sq mi (8.0 km2) 0.7% |
| Population (2020) | |
• Total | 390,357 |
• Estimate (2024) | 399,542 |
| • Density | 836/sq mi (323/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 8th |
| Website | bcohio |
Butler County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 390,357, making it the seventh-most populous county in Ohio. Its county seat and most populous city is Hamilton. It is named for General Richard Butler, who died in 1791 during St. Clair's defeat. Located along the Great Miami River, it is also home to Miami University, a public university founded in 1809. Butler County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.