14 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 59901 | Kalispell | 63,161 |
| 59912 | Columbia Falls | 15,752 |
| 59937 | Whitefish | 15,114 |
| 59922 | Lakeside | 2,337 |
| 59932 | Somers | 1,850 |
| 59920 | Kila | 1,704 |
| 59925 | Marion | 1,532 |
| 59936 | West Glacier | 690 |
| 59919 | Hungry Horse | 679 |
| 59913 | Coram | 582 |
| 59927 | Olney | 270 |
| 59926 | Martin City | 268 |
| 59916 | Essex | 232 |
| 59928 | Polebridge | 86 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Flathead County, Montana (US Census).