Naperville, Illinois

Naperville, Illinois
Aerial view of downtown Naperville
Motto: 
Great Service – All the Time
Location of Naperville in Will and DuPage counties in Illinois
Naperville
Naperville
Naperville
Coordinates: 41°44′54″N 88°09′57″W / 41.74826°N 88.16585°W / 41.74826; -88.16585
Country United States
State Illinois
CountiesDuPage, Will
TownshipsDupage: Lisle, Milton, Naperville, Winfield
Will: DuPage, Wheatland
Settled1831
IncorporatedFebruary 7, 1857 (1857-02-07) (Village)
March 17, 1890 (1890-03-17) (City)
Named afterJoseph Naper
Government
  TypeCouncil–manager
  MayorScott Wehrli (R)
Area
  Total
39.70 sq mi (102.81 km2)
  Land39.11 sq mi (101.29 km2)
  Water0.59 sq mi (1.52 km2)
Elevation
705 ft (215 m)
Population
 (2020)
  Total
149,540
  Density3,823.57/sq mi (1,476.29/km2)
DemonymNapervillian
Time zoneUTC−6 (CST)
  Summer (DST)UTC−5 (CDT)
ZIP Codes
60540, 60563–60565, and P.O. box only 60566–60567
Area codes630 and 331
FIPS code17-51622
GNIS feature ID2395147
Websitenaperville.il.us

Naperville (/ˈnpərˌvɪl/ NAY-pər-vil) is a city in DuPage and Will counties in the U.S. state of Illinois. It is a southwestern suburb 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.

In 2025, Naperville was named America’s best city to live in by Niche, noting its quality of life, schools, economy and affordability.