Resident Population in Arenac County, MI was 15.08700 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Arenac County, MI reached a record high of 17.27900 in January of 2000 and a record low of 11.14900 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Arenac County, MI - last updated from the United States Federal Reserve on April of 2026.