| Zip Code | City | Population ↓ |
|---|---|---|
| 59901 | Kalispell | 60,177 |
| 59912 | Columbia Falls | 15,381 |
| 59937 | Whitefish | 14,183 |
| 59922 | Lakeside | 2,501 |
| 59925 | Marion | 1,654 |
| 59920 | Kila | 1,525 |
| 59932 | Somers | 1,347 |
| 59919 | Hungry Horse | 891 |
| 59913 | Coram | 544 |
| 59936 | West Glacier | 514 |
| 59927 | Olney | 328 |
| 59926 | Martin City | 280 |
| 59928 | Polebridge | 190 |
| 59916 | Essex | 186 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Flathead County, Montana (US Census).