Illinois Zip Codes

Illinois has a total of 1,386 ZIP codes, reflecting its combination of major urban areas, suburban communities, and rural regions. ZIP codes in Illinois start with the digits 60, 61, or 62, covering the state’s diverse geography. The range begins at 60001 in Alden and extends to 62999 in Wolf Lake.

The 60 series covers the northeastern part of the state, including the densely populated Chicago metropolitan area and its suburbs, such as Naperville, Schaumburg, and Evanston. The 61 series serves northwestern and central Illinois, including cities like Rockford and Peoria. The 62 series is assigned to southern Illinois, encompassing cities such as Springfield, Belleville, and Carbondale.

Illinois’ ZIP codes are critical for managing mail delivery, public services, and logistics across its wide-ranging economic and geographic regions. They play a key role in defining school districts, tax jurisdictions, and political boundaries, as well as supporting industries like manufacturing, agriculture, and commerce.

In the table below, you can see all Illinois zip codes listed by city, town and village as well as county affiliated. With 934 cities (and towns) and 102 counties (and county-equivalents), Illinois is the 6th largest state by population (12,801,539)  and 24th largest one by land area (143,793 km²) in the United States.

The capital of Illinois is Chicago and major cities include Aurora, Rockford, Joliet, Naperville, and Springfield.

List of Illinois Zip Codes by City