Founded in February 6, 1893, Flathead County is one of 56 counties in the state of Montana. Historically, Flathead County was formed from Missoula County. The city of Kalispell is the county seat. With FIPS code of 29, Flathead County has a population of 108,454 and area of 5,099 square miles (13,206 km2).
List of all cities in Flathead County, MT alphabetically
| City/Town | Postal Code | Area Code |
| Apgar, MT | 59936 | 406 |
| Bigfork, MT | 59911 | 406 |
| Columbia Falls, MT | 59912 | 406 |
| Coram, MT | 59913 | 406 |
| Creston, MT | 59901 | 406 |
| Essex, MT | 59916 | 406 |
| Evergreen, MT | 59901 | 406 |
| Hungry Horse, MT | 59919 | 406 |
| Kalispell, MT | 59901 | 406 |
| 59903 | 406 | |
| 59904 | 406 | |
| Kila, MT | 59920 | 406 |
| Lake McDonald, MT | 59921 | 406 |
| Lakeside, MT | 59922 | 406 |
| Marion, MT | 59925 | 406 |
| Martin City, MT | 59926 | 406 |
| Olney, MT | 59927 | 406 |
| Polebridge, MT | 59928 | 406 |
| Somers, MT | 59932 | 406 |
| Swan Lake, MT | 59911 | 406 |
| West Glacier, MT | 59921 | 406 |
| 59936 | 406 | |
| Whitefish, MT | 59937 | 406 |