Resident Population in Oceana County, MI was 27.01400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Oceana County, MI reached a record high of 28.01300 in January of 2006 and a record low of 17.98400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Oceana County, MI - last updated from the United States Federal Reserve on April of 2026.