| Zip Code | City | Population ↓ |
|---|---|---|
| 59718 | Bozeman | 42,538 |
| 59715 | Bozeman | 39,061 |
| 59714 | Belgrade | 23,248 |
| 59741 | Manhattan | 5,315 |
| 59752 | Three Forks | 4,545 |
| 59730 | Gallatin Gateway | 2,384 |
| 59758 | West Yellowstone | 1,804 |
| 59760 | Willow Creek | 252 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Gallatin County, Montana (US Census).