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Naperville () is a city in DuPage and Will counties in the U.S. state of Illinois, it is 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.
St. Charles is an affluent city in DuPage and Kane counties in the U.S. state of Illinois. It lies roughly 40 miles (64 km) west of Chicago on Illinois Route 64. As of the 2010 census the population was 32,974, and as of 2019 the population had decreased to an estimated 32,887. The official city slogan is "Pride of the Fox", after the Fox River that runs through the center of town. St. Charles is part of a tri-city area along with Geneva and Batavia, all western suburbs of similar size and relative socioeconomic condition.
Lisle ( LY-əl) is a village in DuPage County, Illinois, United States. The population was 22,390 at the 2010 census, and in 2019 the population was recorded to be 23,270. It is part of the Chicago metropolitan area and the Illinois Technology and Research Corridor. It is also the headquarters of the Nuclear Regulatory Commission Region III. In July 2007, Lisle was ranked No. 20 in Money magazine's list of "100 Best Places to Live" and No. 17 on their 2009 list of the "Best Places for the Rich and Single."