ZIP Codes in Bay City, MI
Bay City uses 2 ZIP codes, all in Bay County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Bay City ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 48706 | standard | Bay | 38,974 |
| 48708 | standard | Bay | 25,635 |
Finding a ZIP+4 in Bay City
Knowing which of these 2 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 Bay City street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Bay City addresses and download it complete.