Sussex is located in Waukesha County, WI. The population is 10,489, making Sussex the 8th largest city in Waukesha County.
There are 5 public schools in Sussex with an average Homefacts rating of A+. The total crime rate for Sussex is very low , and there are 13 registered sex offenders residing in the city. Unemployment in Sussex is low and the median home sales price is $0. Detailed and up-to-date Sussex property reports are available for any property address.