| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 59401 | Great Falls | Cascade County | Standard |
| 59402 | Malmstrom AFB | Cascade County | Standard |
| 59403 | Great Falls | Cascade County | PO Box |
| 59404 | Great Falls | Cascade County | Standard |
| 59405 | Great Falls | Cascade County | Standard |
| 59406 | Great Falls | Cascade County | PO Box |
| 59412 | Belt | Cascade County | Standard |
| 59414 | Black Eagle | Cascade County | Standard |
| 59421 | Cascade | Cascade County | Standard |
| 59440 | Floweree | Chouteau County | Standard |
| 59443 | Fort Shaw | Cascade County | Standard |
| 59463 | Monarch | Cascade County | Standard |
| 59465 | Neihart | Cascade County | Standard |
| 59468 | Power | Teton County | Standard |
| 59469 | Raynesford | Judith Basin County | Standard |
| 59472 | Sand Coulee | Cascade County | Standard |
| 59477 | Simms | Cascade County | PO Box |
| 59480 | Stockett | Cascade County | Standard |
| 59483 | Sun River | Cascade County | Standard |
| 59485 | Ulm | Cascade County | PO Box |
| 59487 | Vaughn | Cascade County | Standard |