Resident Population in Bay County, MI was 102.50000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Bay County, MI reached a record high of 122.10000 in January of 1978 and a record low of 102.50000 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Bay County, MI - last updated from the United States Federal Reserve on May of 2024.