what county is pewaukee wi in
Homefacts City Report. Pewaukee is located in Waukesha County, WI. The population is 13,274, making Pewaukee the 7th largest city in Waukesha County. There are 4 public schools in Pewaukee with an average Homefacts rating of A+. The total crime rate for Pewaukee is low, and there are 36 registered sex offenders residing in the city.