Resident Population in Monroe, MI (MSA) was 156.00400 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Monroe, MI (MSA) reached a record high of 156.04500 in January of 2024 and a record low of 146.41200 in January of 2000. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Monroe, MI (MSA) - last updated from the United States Federal Reserve on May of 2026.