Waukesha County, Wisconsin
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.
Waukesha County is included in the Milwaukee metropolitan area, and is one of the three WOW counties.