Waterloo is located in Jefferson County, WI. The population is 3,355, making Waterloo the 5th largest city in Jefferson County.
There are 4 public schools in Waterloo with an average Homefacts rating of C+. The total crime rate for Waterloo is very low , and there are 16 registered sex offenders residing in the city. Unemployment in Waterloo is low and the median home sales price is $0. Detailed and up-to-date Waterloo property reports are available for any property address.