Johnston County, Oklahoma

Johnston County
Location within the U.S. state of Oklahoma
Oklahoma's location within the U.S.
Coordinates: 34°19′N 96°40′W / 34.31°N 96.66°W / 34.31; -96.66
Country United States
State Oklahoma
Founded1907
Named afterDouglas H. Johnston
SeatTishomingo
Largest cityTishomingo
Area
  Total
658 sq mi (1,700 km2)
  Land643 sq mi (1,670 km2)
  Water15 sq mi (40 km2)  2.3%
Population
 (2020)
  Total
10,272
  Density16/sq mi (6.0/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district2nd
Websitewww.johnstoncountyok.org

Johnston County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 10,272. Its county seat is Tishomingo. It was established at statehood on November 16, 1907, and named for Douglas H. Johnston, a governor of the Chickasaw Nation.

Johnston County is part of the Texoma Region.