Resident Population in Roger Mills County, OK was 3.29500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Roger Mills County, OK reached a record high of 6.00600 in January of 1983 and a record low of 3.13400 in January of 2003. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Roger Mills County, OK - last updated from the United States Federal Reserve on May of 2024.