Resident Population in Macomb County, MI was 886.17500 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Macomb County, MI reached a record high of 886.17500 in January of 2024 and a record low of 626.20400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Macomb County, MI - last updated from the United States Federal Reserve on September of 2025.