Roger Mills County, Oklahoma
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.