Resident Population in Pawnee County, OK was 16.02900 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Pawnee County, OK reached a record high of 16.73800 in January of 2001 and a record low of 11.33800 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Pawnee County, OK - last updated from the United States Federal Reserve on June of 2026.