61104 ZIP Code Rockford, Illinois – USA
The ZIP code 61104 is assigned to Rockford city, located in the Winnebago county that is part of the state of Illinois, IL, United States.
61104 zip code map
Postcode location
Rockford Illinois,IL
State of 61104
Check all the Illinois ZIP Code list.
US ZIP Codes
Please check all state’s postal code in the United States.