Resident Population in Seminole County, OK was 23.56500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Seminole County, OK reached a record high of 28.76700 in January of 1983 and a record low of 23.35100 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Seminole County, OK - last updated from the United States Federal Reserve on May of 2024.