Montgomery County, Ohio
Montgomery County | |
|---|---|
Current Montgomery County Courthouse | |
Location within the U.S. state of Ohio | |
Ohio's location within the U.S. | |
| Coordinates: 39°45′N 84°17′W / 39.75°N 84.29°W | |
| Country | United States |
| State | Ohio |
| Founded | May 1, 1803 |
| Named after | Richard Montgomery |
| Seat | Dayton |
| Largest city | Dayton |
| Area | |
• Total | 464 sq mi (1,200 km2) |
| • Land | 462 sq mi (1,200 km2) |
| • Water | 2.8 sq mi (7 km2) 0.6% |
| Population (2020) | |
• Total | 537,309 |
• Estimate (2021) | 535,840 |
| • Density | 1,200/sq mi (450/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 10th |
| Website | www |
Montgomery County is in the southwestern part of the U.S. state of Ohio. At the 2020 census, the population was 537,309, making it the fifth-most populous county in Ohio. The county seat is Dayton. The county was named in honor of Richard Montgomery, an American Revolutionary War general, who was killed in 1775 while attempting to capture Quebec City, Canada. Montgomery County is part of the Dayton, Ohio, Metropolitan Statistical Area.