Resident Population in Cimarron County, OK was 2.19100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Cimarron County, OK reached a record high of 4.14500 in January of 1970 and a record low of 2.14800 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Cimarron County, OK - last updated from the United States Federal Reserve on May of 2024.