Roger Mills County, Oklahoma

Roger Mills County, Oklahoma
Location within the U.S. state of Oklahoma
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
 • Density3.017/sq mi (1.165/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.