| Zip Code | City | Population ↓ |
|---|---|---|
| 59201 | Wolf Point | 5,532 |
| 59255 | Poplar | 3,078 |
| 59218 | Culbertson | 1,069 |
| 59213 | Brockton | 822 |
| 59226 | Froid | 653 |
| 59212 | Bainville | 370 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 6 ZCTAs in Roosevelt County, Montana (US Census).