County · Tennessee

Sullivan County

Sullivan County is a county located in the U.S. state of Tennessee on its northeast border. As of the 2020 census, the population was 158,163. Its county seat is Blountville. Sullivan County is part of the Kingsport–Bristol TN-VA Metropolitan Statistical Area, which is a component of the Kingsport–Johnson City–Bristol, TN-VA Combined Statistical Area, commonly known as the "Tri-Cities" region. Sullivan is Tennessee's second-oldest county; it was established in 1779 when the area was still part of North Carolina. From 1784 to 1788, it was part of the extra-legal State of Franklin.

Governance bodies

County Commission Primary
governing council

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Reference data (Census of Governments 2022)

Census ID (PID6): 175699
FIPS state: 47
FIPS county: 163
FIPS place: 99163
Census record name: COUNTY OF SULLIVAN
Mailing address: 3411 HIGHWAY 126, BLOUNTVILLE 37617