Resident Population in Delta County, MI was 36.79000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Delta County, MI reached a record high of 39.82600 in January of 1982 and a record low of 35.74400 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Delta County, MI - last updated from the United States Federal Reserve on May of 2024.