Resident Population in Alpena County, MI was 28.90400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Alpena County, MI reached a record high of 32.74400 in January of 1981 and a record low of 28.39100 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Alpena County, MI - last updated from the United States Federal Reserve on May of 2024.