Milwaukee-Waukesha, WI - Resident Population in Milwaukee-Waukesha-West Allis, WI (MSA) was 1574.45200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Milwaukee-Waukesha, WI - Resident Population in Milwaukee-Waukesha-West Allis, WI (MSA) reached a record high of 1577.45500 in January of 2019 and a record low of 1502.30500 in January of 2000. Trading Economics provides the current actual value, an historical data chart and related indicators for Milwaukee-Waukesha, WI - Resident Population in Milwaukee-Waukesha-West Allis, WI (MSA) - last updated from the United States Federal Reserve on April of 2026.