What suburb is Naperville in? Chicago Naperville (/ˈneɪpərˌvɪl/ NAY-pər-vil) is a city in DuPage and Will counties in the U.S. state of Illinois, and a suburb of Chicago. Located 28 miles (45 km) west of Chicago, Naperville was founded in 1831 and is the fourth most populous city in Illinois….Continue Reading