Resident Population in Osceola County, MI was 23.48400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Osceola County, MI reached a record high of 23.57200 in January of 2003 and a record low of 14.83800 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Osceola County, MI - last updated from the United States Federal Reserve on April of 2026.