Naperville
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About Naperville
City in Illinois, United StatesNaperville (, NAY-pər-vil) is a city in DuPage and Will counties in the U.S. state of Illinois. It is a city southwest of Chicago located 28 miles (45 km) west of the city on the DuPage River. As of the 2020 census, its population was 149,540, making it the state's fourth-most populous city. Naperville was founded in 1831 by Joseph Naper. The city was established by the banks of the DuPage River and was originally known as Naper's Settlement. By 1832, over 100 residents lived in Naper's Settlement. In 1839, after DuPage County was split from Cook County, Naperville became the county seat, which it remained until 1868. Beginning in the 1960s, Naperville experienced a significant population i…
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How Naperville ranks
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Housing in Naperville
The median sale price was $620,000 in May 2026.
A seller's market
Safety in Naperville
Safety Grade A-
Naperville reports less crime per resident than 75% of the U.S. towns and cities we grade.
Health in Naperville
Compared with Illinois
of 32 measures CDC estimates. The other 8 are too close to call.
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Where Naperville is
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