ZIP Codes in Helena, MT
Helena uses 4 ZIP codes, all in Lewis and Clark County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Helena ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 59601 | standard | Lewis and Clark | 31,728 |
| 59602 | standard | Lewis and Clark | 30,754 |
| 59623 | standard | Lewis and Clark | — |
| 59625 | standard | Lewis and Clark | 663 |
Finding a ZIP+4 in Helena
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 Helena 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 Helena addresses and download it complete.