This is an online tool (Mashup) to search zip code of a place, address or city in Illinois, US.
Select the name of the Place/Address/City (in Illinois, US) from the suggested list.
This will display the zip code of the selected location from Illinois, US on Google map. Note that the zip code may be searched with nearby approximation.
Below is the select list of some major cities from Illinois, US. Click on the "Show Zip Code" button to go get its zip code.
Note that many cities from Illinois, US may have multiple localities in it, so the clicking on "Show Zip Code" below may only show zip code of central locality.
For specific locality/address, you need to select its name in the above text box.