Rockford zipcode
| City | Rockford |
| ZIP Code | 61103 |
| Type | Standard |
| State Code | IL |
| State | Illinois |
ZIP code of Rockford is 61103. This place is located in Illinois state in US. To send any postal service to Rockford, you must use 61103 zipcode.
The ZIP code 61103 is also used with 2 more city names of Illinois.
- Machesney Park, IL
- Machesney Pk, IL