County · Tennessee

Washington County

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.

Governance bodies

County Commission Primary
governing council

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Cities and towns 2

Reference data (Census of Governments 2022)

Census ID (PID6): 184262
FIPS state: 47
FIPS county: 179
FIPS place: 99179
Census record name: COUNTY OF WASHINGTON
Mailing address: PO BOX 219, JONESBOROUGH 37659