ZIP Codes in Rockford, IL
Rockford uses 9 ZIP codes, all in Winnebago County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 9 Rockford ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 61101 | standard | Winnebago | 19,318 |
| 61102 | standard | Winnebago | 15,937 |
| 61103 | standard | Winnebago | 22,869 |
| 61104 | standard | Winnebago | 17,222 |
| 61107 | standard | Winnebago | 30,765 |
| 61108 | standard | Winnebago | 30,355 |
| 61109 | standard | Winnebago | 26,768 |
| 61112 | standard | Winnebago | 152 |
| 61114 | standard | Winnebago | 15,325 |
Finding a ZIP+4 in Rockford
Knowing which of these 9 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Rockford street almost always have different ZIP+4 codes even though they share all five leading digits.
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