Johnson County, Tennessee

Johnson County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 17,948. Its county seat is Mountain City. It is the state's northeasternmost county, sharing borders with Virginia and North Carolina.

Johnson County
Johnson County Courthouse in Mountain City
Location within the U.S. state of Tennessee
Tennessee's location within the U.S.
Coordinates: 36°28′N 81°52′W
Country United States
State Tennessee
Founded1836
Named forThomas Johnson, early settler
SeatMountain City
Largest townMountain City
Area
  Total303 sq mi (780 km2)
  Land298 sq mi (770 km2)
  Water4.2 sq mi (11 km2)  1.4%
Population
 (2020)
  Total17,948
  Density61/sq mi (24/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district1st
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