Wauwatosa

Wauwatosa ( WAW-wə-TOH-sə; colloquially Tosa) is a city in Milwaukee County, Wisconsin, United States. The population was 48,387 at the 2020 census. Wauwatosa is a suburb located immediately west of Milwaukee and is part of the Milwaukee metropolitan area. It is named after the Potawatomi Chief Wauwataesie and the Potawatomi word for firefly.