Naperville, Illinois

"Naperville" redirects here; not to be confused with Napierville.

Naperville, Illinois
City
Aerial view of downtown Naperville
Flag Seal
Motto:  Great Service – All the Time
Interactive map of Naperville, Illinois
Naperville Location within Chicago metropolitan area Naperville Location within Illinois Naperville Location within the United States
Coordinates: 41°45′50″N 88°08′52″W
Country	United States
State	Illinois
Counties	DuPage, Will
Townships	Dupage: Lisle, Milton, Naperville, Winfield Will: DuPage, Wheatland
Settled	1831
Incorporated	February 7, 1857 (1857-02-07) (Village) March 17, 1890 (1890-03-17) (City}
Named for	Joseph Naper
Government
• Type	Council–manager
Area
• Total	39.70 sq mi (102.81 km2)
• Land	39.11 sq mi (101.29 km2)
• Water	0.59 sq mi (1.52 km2)
Elevation	705 ft (215 m)
Population  (2020)
• Total	149,540
• Estimate  (2024)	153,124
• Density	3,823.6/sq mi (1,476.29/km2)
Demonym	Napervillian
Time zone	UTC−6 (CST)
• Summer (DST)	UTC−5 (CDT)
ZIP Codes	60540, 60563–60565, and P.O. box only 60566–60567
Area codes	630 and 331
FIPS code	17-51622
GNIS feature ID	2395147
Website	naperville.il.us

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Naperville (/ˈneɪ.pər.vɪl/, 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 increase as a result of Chicago's urban sprawl.

Naperville is home to Moser Tower and Millennium Carillon, one of the world's four largest carillons. It is also home to an extensive parks and forest preserve network, including Centennial Beach. The city has two school districts, 203 and 204. Naperville's largest employer is Edward Hospital with 4,500 employees. Naperville has a train station served by Amtrak and Metra.