Washington County, Tennessee
Washington County, Tennessee | |
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Washington County Courthouse in Jonesborough | |
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Flag Seal | |
Location within the U.S. state of Tennessee | |
| Coordinates: 36°17′N 82°30′W / 36.29°N 82.5°W | |
| Country | United States |
| State | Tennessee |
| Founded | 1777 |
| Named after | George Washington |
| Seat | Jonesborough |
| Largest city | Johnson City |
| Area | |
• Total | 330 sq mi (850 km2) |
| • Land | 326 sq mi (840 km2) |
| • Water | 3.3 sq mi (8.5 km2) 1.0% |
| Population (2020) | |
• Total | 133,001 |
• Estimate (2023) | 138,420 |
| • Density | 408/sq mi (158/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 1st |
| Website | www |
Washington County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 133,001. Its county seat is Jonesborough. The county's largest city and a regional educational, medical and commercial center is Johnson City. Washington County is Tennessee's oldest county, having been established in 1777 when the state was still part of North Carolina. Washington County is part of the Johnson City, TN Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area, commonly known as the "Tri-Cities" region.