Resident Population in Blaine County, OK was 8.57300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Blaine County, OK reached a record high of 14.96800 in January of 1982 and a record low of 8.47700 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Blaine County, OK - last updated from the United States Federal Reserve on April of 2026.