Resident Population in Custer County, OK was 28.26600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Custer County, OK reached a record high of 32.28500 in January of 1983 and a record low of 22.66500 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Custer County, OK - last updated from the United States Federal Reserve on May of 2024.