Naperville is located in Dupage County, IL. The population is 145,137, making Naperville the 2nd largest city in Dupage County and the 3rd largest city in the state of Illinois.
There are 57 public schools in Naperville with an average Homefacts rating of A+. The total crime rate for Naperville is low , and there are 33 registered sex offenders residing in the city. Unemployment in Naperville is low and the median home sales price is $0. Detailed and up-to-date Naperville property reports are available for any property address.