Resident Population in Marquette County, MI was 66.99900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Marquette County, MI reached a record high of 75.60000 in January of 1979 and a record low of 63.40700 in January of 1997. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Marquette County, MI - last updated from the United States Federal Reserve on May of 2024.