Pewaukee is a city in Waukesha County, Wisconsin. The population was 15,914 at the 2020 census. The Village of Pewaukee, which was incorporated out of the town before it incorporated as a city, is surrounded by the city.

Waukesha County is a county in the U.S. state of Wisconsin. As of the 2020 United States Census, the population was 406,978, making it the third-most populous county in Wisconsin. Its county seat and largest city is Waukesha.