Illinois Zip Codes


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Zip codes Illinois - IL, US

The US Postal Code assigns a unique code for each city in the Illinois State, US.

Since 1980, US adopted an extended zip+4 code system (officially called Zip Code 5 Plus 4 - US Postal Code) that still coexists with the previous one. The new IL zip codes system includes the five digits of the city ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code.

In this web site you can search for Illinois ZIP Codes using both ZIP Code Standard and Zip Code 5 plus 4 IL

Illinois - IL Zip Code US

Illinois (IL) Zip Codes by City

By pressing Ctrl + F keys you can find IL zip codes by cities

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