ZIP Codes in Port Byron, IL
Port Byron uses 1 ZIP code, all in Rock Island County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Port Byron ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 61275 | standard | Rock Island | 4,253 |
Finding a ZIP+4 in Port Byron
Knowing which of these 1 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 Port Byron street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
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