Washington County, Ohio
Washington County, Ohio | |
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Flag Seal | |
Location within the U.S. state of Ohio | |
| Coordinates: 39°28′N 81°29′W / 39.46°N 81.49°W | |
| Country | United States |
| State | Ohio |
| Founded | July 27, 1788 |
| Named after | George Washington |
| Seat | Marietta |
| Largest city | Marietta |
| Area | |
• Total | 640 sq mi (1,700 km2) |
| • Land | 632 sq mi (1,640 km2) |
| • Water | 8.0 sq mi (21 km2) 1.3% |
| Population (2020) | |
• Total | 59,771 |
| • Density | 93/sq mi (36/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 6th |
| Website | www |
Washington County is a county located in the southeastern part of the U.S. state of Ohio. As of the 2020 census, the population was 59,711. Its county seat is Marietta. The county, the oldest in the state, is named for George Washington. Washington County comprises the Marietta, OH Micropolitan Statistical Area, which is also included in the Parkersburg-Marietta-Vienna, WV-OH Combined Statistical Area.