Wauwatosa is a city in Milwaukee County, Wisconsin, United States, and was incorporated on May 27, 1897. As of the 2006 census estimate, the city's population was 44,798. Wauwatosa is located immediately west of Milwaukee, Wisconsin, and is a part of the Milwaukee metropolitan area. It is named after the Potawatomi word for firefly.
Wauwatosa contains Milwaukee County's Regional Medical Center, which includes the Medical College of Wisconsin, the Children's Hospital of Wisconsin, and Froedtert Hospital, one of two level-one trauma centers in the state. Other points of interest are the Annunciation Greek Orthodox Church designed by Frank Lloyd Wright; and the Memorial Center, built in 1957, which contains the public library, an auditorium, and the city hall. The Washington Highlands, a residential neighborhood designed in 1916 by renowned city planner Werner Hegemann, was added to the National Register of Historic Places in 1989.
The lush Menomonee Valley of the Wauwatosa area provided a key overland gateway between the rich glacial farmland of southeastern Wisconsin and the Port of Milwaukee. In 1835, Charles Hart became the first permanent white settler, followed by seventeen other families the same year. The following year a United States Road was built from Milwaukee through Wauwatosa, eventually reaching Madison. Charles Hart built a mill in 1845 on the Menomonee River which gave the settlement its original name of "Hart's Mill". The mill was torn down in 1914.