3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kalispell | 1 | 34,310 | 25,267 | 4.59% | 2,610 | 13 | City |
| Whitefish | 2 | 9,945 | 7,877 | 3.59% | 1,346 | 7 | City |
| Columbia Falls | 3 | 5,871 | 5,396 | 1.36% | 2,574 | 2 | City |
Kalispell is the largest city in Flathead County, with a population of 34,310.
Columbia Falls is the smallest city in Flathead County, with a population of 5,871.
There are 3 cities in Flathead County, Montana.