17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Missoula | 1 | 79,996 | 74,398 | 1.42% | 2,298 | 34.81 | City |
| Orchard Homes | 2 | 5,282 | 5,480 | 0.11% | 940 | 5.62 | CDP |
| Lolo | 3 | 4,743 | 4,064 | 1.22% | 501 | 9.46 | CDP |
| East Missoula | 4 | 2,092 | 2,214 | -0.19% | 1,736 | 1.21 | CDP |
| Seeley Lake | 5 | 1,573 | 1,512 | -0.32% | 128 | 12.26 | CDP |
| Frenchtown | 6 | 1,506 | 1,741 | -1.44% | 224 | 6.74 | CDP |
| Wye | 7 | 1,215 | 843 | 4.02% | 416 | 2.92 | CDP |
| Bonner-West Riverside | 8 | 1,186 | 1,404 | -2.55% | 773 | 1.53 | CDP |
| Piltzville | 9 | 714 | 690 | 3.18% | 955 | 0.75 | CDP |
| Clinton | 10 | 668 | 661 | -3.75% | 204 | 3.27 | CDP |
| Evaro | 11 | 551 | 401 | 2.8% | 32 | 17.16 | CDP |
| Turah | 12 | 506 | 309 | 2.64% | 379 | 1.33 | CDP |
| Carlton | 13 | 415 | 612 | -4.38% | 67 | 6.16 | CDP |
| Condon | 14 | 298 | 282 | -1% | 14 | 21.40 | CDP |
| Twin Creeks | 15 | 235 | 198 | 7.31% | 210 | 1.12 | CDP |
| Huson | 16 | 51 | 60 | -17.74% | 67 | 0.77 | CDP |
| Potomac | 17 | 22 | 37 | 4.76% | 80 | 0.28 | CDP |
Missoula is the largest city in Missoula County, with a population of 79,996.
Potomac is the smallest city in Missoula County.
There are 17 cities in Missoula County, Montana.