Joliet, Illinois

Joliet, Illinois
Downtown
Motto: 
Crossroads of Mid-America
Interactive map of Joliet, Illinois
Joliet
Joliet
Joliet
Coordinates: 41°31′47″N 88°04′22″W / 41.52972°N 88.07278°W / 41.52972; -88.07278
Country United States
State Illinois
CountiesWill and Kendall
TownshipsJoliet, Troy, Plainfield, Lockport, New Lenox, Jackson, Channahon, Seward, Na-Au-Say
Settled1833
Incorporated1852
Named afterLouis Jolliet
Government
 • TypeCouncil–manager
 • MayorTerry D'Arcy (Independent)
Area
 • Total
65.82 sq mi (170.48 km2)
 • Land65.08 sq mi (168.56 km2)
 • Water0.74 sq mi (1.92 km2)
Elevation
610 ft (190 m)
Population
 (2020)
 • Total
150,362
 • Estimate 
(2024)
151,837
 • RankUS: 178th
 • Density2,310.3/sq mi (892.02/km2)
Time zoneUTC−6 (CST)
 • Summer (DST)UTC−5 (CDT)
ZIP codes
60431–60436, 60441, 60586
Area codes815, 779
FIPS code17-38570
AirportJoliet Regional Airport
GNIS feature ID2395477
DemonymJolietan
Wikimedia CommonsJoliet, Illinois
Websitewww.joliet.gov

Joliet (/ˈliɛt, ˌliˈɛt/ JOH-lee-et, -⁠ET) is a city in Will and Kendall counties in the U.S. state of Illinois. Located 40 miles (64 km) southwest of Chicago, it is the county seat of Will County. The population was 150,362 at the 2020 census, making it the third-most populous city in Illinois.