Wilmington, Illinois

Wilmington, Illinois
Baltimore Street (IL-53)
Nickname: 
The Island City
Location of Wilmington in Will County, Illinois.
CountryUnited States
StateIllinois
CountiesWill
Founded1836
Incorporated1854
Government
  MayorBen Dietz
Area
  Total
14.52 sq mi (37.61 km2)
  Land13.80 sq mi (35.75 km2)
  Water0.72 sq mi (1.86 km2)
Elevation
528 ft (161 m)
Population
 (2020)
  Total
5,664
  Density410.35/sq mi (158.44/km2)
Time zoneUTC-6 (CST)
  Summer (DST)UTC-5 (CDT)
ZIP code
60481
Area code815
FIPS code17-82101
GNIS feature ID2397328
Websitewww.wilmington-il.com

Wilmington is a city in Will County, Illinois, United States. Located on Illinois Route 53 and Historic U.S. Route 66 along the east bank of the Kankakee River, it is approximately 60 miles (97 km) south-west from downtown Chicago. The population was 5,664 at the 2020 census. Wilmington is just south of Midewin National Tallgrass Prairie, which is home to the largest bison herd in the state.