Casco is located in Kewaunee County, WI. The population is , making Casco the 4th largest city in Kewaunee County.
There are 1 public schools in Casco with an average Homefacts rating of A-. The total crime rate for Casco is very low, and there are 3 registered sex offenders residing in the city. Unemployment in Casco is low and the median home sales price is $0.