Resident Population in Iron County, MI was 11.70900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Iron County, MI reached a record high of 14.10000 in January of 1976 and a record low of 11.05300 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Iron County, MI - last updated from the United States Federal Reserve on April of 2026.