There are 3 zip codes but I don't know which one you want.
Go to the USPS site and click on Lookup Zip Codes (see Related Links).
60450 is the zip code for Morris, Illinois.
The zip code for Mattoon, Illinois is 61938.
Lockport is in Will County.
The address of the Illinois State Museum Lockport Gallery is: 201 W 10Th St, Lockport, IL 60441
The web address of the Illinois State Museum Lockport Gallery is: http://www.illinois.com
The phone number of the Illinois State Museum Lockport Gallery is: 815-838-7400.
It has 7 zip codes in that city. Link for them is posted below.
Salem, IL's zip code is: 62881
60504 is a ZIP code for Aurora, Illinois.
The zip code for Belvidere, IL is 61008.
60416 Zip Code (Coal City, Illinois)
Zip Code 60084 is for Wauconda, Illinois.