Harper County, Oklahoma

Harper County
Location within the U.S. state of Oklahoma
Oklahoma's location within the U.S.
Coordinates: 36°47′N 99°39′W / 36.78°N 99.65°W / 36.78; -99.65
Country United States
State Oklahoma
Founded1907
SeatBuffalo
Largest townLaverne
Area
  Total
1,041 sq mi (2,700 km2)
  Land1,039 sq mi (2,690 km2)
  Water2.0 sq mi (5 km2)  0.2%
Population
 (2020)
  Total
3,272
  Density3.1/sq mi (1.2/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district3rd

Harper County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 3,272, making it the third-least populous county in Oklahoma. The county seat is Buffalo. It was created in 1907 from the northwestern part of Woodward County, and named for Oscar Green Harper, who was clerk of the Oklahoma Constitutional Convention.