Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kalispell | 1 | 31,540 | 24,924 | 5.53% | 2,486 | 12.7 | City |
| Whitefish | 2 | 9,599 | 7,855 | 4.76% | 1,337 | 7.2 | City |
| Evergreen | 3 | 8,664 | 8,416 | 0.87% | 1,013 | 8.6 | CDP |
| Columbia Falls | 4 | 5,833 | 5,392 | 1.92% | 2,557 | 2.3 | City |
| Bigfork | 5 | 5,067 | 4,733 | 1.14% | 162 | 31.3 | CDP |
| Lakeside | 6 | 2,546 | 2,245 | -0.35% | 181 | 14.1 | CDP |
| Marion | 7 | 1,274 | 1,041 | 2.17% | 76 | 16.9 | CDP |
| Helena Flats | 8 | 1,076 | 1,219 | 0.28% | 128 | 8.4 | CDP |
| Somers | 9 | 1,025 | 1,079 | -0.58% | 347 | 3.0 | CDP |
| Hungry Horse | 10 | 902 | 650 | 0.67% | 629 | 1.4 | CDP |
| Woods Bay | 11 | 750 | 778 | 0.94% | 551 | 1.4 | CDP |
| Batavia | 12 | 737 | 480 | 3.51% | 408 | 1.8 | CDP |
| Kila | 13 | 448 | 411 | 0.9% | 113 | 4.0 | CDP |
| Coram | 14 | 426 | 302 | -1.84% | 115 | 3.7 | CDP |
| Martin City | 15 | 276 | 369 | -5.48% | 160 | 1.7 | CDP |
| Rhodes | 16 | 253 | 210 | 7.66% | 378 | 0.7 | CDP |
| Forest Hill Village | 17 | 250 | 99 | 1.21% | 162 | 1.5 | CDP |
| Bear Dance | 18 | 235 | 227 | -1.26% | 85 | 2.8 | CDP |
| Swan Lake | 19 | 233 | 202 | 3.56% | 31 | 7.6 | CDP |
| West Glacier | 20 | 165 | 124 | -2.94% | 40 | 4.1 | CDP |
| Olney | 21 | 122 | 113 | -3.94% | 92 | 1.3 | CDP |
| Little Bitterroot Lake | 22 | 89 | 139 | -7.29% | 11 | 8.4 | CDP |
| Essex | 23 | 84 | 61 | 7.69% | 162 | 0.5 | CDP |
| Pinnacle | 24 | 47 | 48 | 9.3% | 83 | 0.6 | CDP |
| Camas | 25 | 43 | 89 | 7.5% | 79 | 0.5 | CDP |
| Polebridge | 26 | 36 | 33 | 5.88% | 308 | 0.1 | CDP |
| Snowslip | 27 | 8 | 30 | 0% | 10 | 0.8 | CDP |
| Niarada | 28 | 4 | 8 | 33.33% | 0.00 | 49.5 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Kalispell is the largest city in Flathead County.
Niarada is the smallest city in Flathead County.
There are 28 cities in Flathead County, Montana.