Resident Population in Osage County, OK was 46.13000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Osage County, OK reached a record high of 47.77500 in January of 2011 and a record low of 29.70000 in January of 1973. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Osage County, OK - last updated from the United States Federal Reserve on May of 2024.