Resident Population in Branch County, MI was 45.21500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Branch County, MI reached a record high of 46.51300 in January of 2002 and a record low of 37.90600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Branch County, MI - last updated from the United States Federal Reserve on May of 2024.