Resident Population in Saginaw County, MI was 187.78200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Saginaw County, MI reached a record high of 228.05900 in January of 1980 and a record low of 187.78200 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Saginaw County, MI - last updated from the United States Federal Reserve on May of 2024.