9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Malta | 1 | 1,853 | 1,853 | 0% | 1,725 | 1 | City |
| Malta | 2 | 1,853 | 1,850 | 0% | 1,725 | 1 | City |
| Saco | 3 | 160 | 162 | -0.62% | 526 | 0 | Town |
| Saco | 4 | 160 | 162 | -0.62% | 526 | 0 | Town |
| Dodson | 5 | 126 | 126 | 0% | 759 | 0 | Town |
| Dodson | 6 | 126 | 126 | 0% | 759 | 0 | Town |
| Whitewater | 7 | 124 | 112 | 6.9% | 117 | 1 | CDP |
| Landusky | 8 | 32 | 15 | 6.67% | 368 | 0 | CDP |
| Zortman | 9 | 24 | 33 | 9.09% | 6 | 4 | CDP |
Malta is the largest city in Phillips County, with a population of 1,853.
Zortman is the smallest city in Phillips County, with a population of 24.
There are 9 cities in Phillips County, Montana.