ZIP Codes in Portland, ME
Portland uses 4 ZIP codes, all in Cumberland County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Portland ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 04101 | standard | Cumberland | 18,431 |
| 04102 | standard | Cumberland | 17,267 |
| 04103 | standard | Cumberland | 32,024 |
| 04109 | standard | Cumberland | 213 |
Finding a ZIP+4 in Portland
Knowing which of these 4 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 Portland 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 Portland addresses and download it complete.