Waukesha County
County in 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. Wikipedia
Cities: Waukesha, Oconomowoc, Pewaukee, and more
Population: 410,434 (2022)
Non emergency number: 262-446-5070
Area codes: 262, 414
Congressional districts: 1st, 5th
Incorporated: 1846
Largest city: Waukesha