Roger Mills County, Oklahoma

Roger Mills County
Location within the U.S. state of Oklahoma
Oklahoma's location within the U.S.
Coordinates: 35°41′N 99°42′W / 35.69°N 99.7°W / 35.69; -99.7
Country United States
State Oklahoma
Founded1891
Named afterRoger Q. Mills
SeatCheyenne
Largest townCheyenne
Area
  Total
1,146 sq mi (2,970 km2)
  Land1,141 sq mi (2,960 km2)
  Water5.3 sq mi (14 km2)  0.40%
Population
 (2020)
  Total
3,442
  Density3.0/sq mi (1.2/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.rogermills.org

Roger Mills County is a county located in the western part of the U.S. state of Oklahoma. As of the 2020 census, its population was 3,442, making it the fourth-least populous county in Oklahoma. Its county seat is Cheyenne. The county was created in 1891.

Roger Mills county is located above the petroleum-rich Panhandle-Hugoton Field, making it one of the leading sources of oil, natural gas, and helium. The county also overlies part of the Ogallala Aquifer.