Resident Population in Eaton County, MI was 109.49400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Eaton County, MI reached a record high of 110.11900 in January of 2019 and a record low of 68.89200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Eaton County, MI - last updated from the United States Federal Reserve on April of 2026.