Resident Population in Montmorency County, MI was 9.67800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Montmorency County, MI reached a record high of 10.45300 in January of 2003 and a record low of 5.24700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Montmorency County, MI - last updated from the United States Federal Reserve on May of 2024.