4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Butte-Silver Bow | 1 | 36,453 | 34,573 | 1.04% | 51 | 715.76 | Township |
| Anaconda-Deer Lodge County | 2 | 9,841 | 9,420 | 0.86% | 13 | 736.68 | Township |
| Walkerville | 3 | 673 | 637 | 1.05% | 302 | 2.23 | Town |
| Racetrack | 4 | 9 | 7 | 12.5% | 8 | 1.12 | CDP |
Butte-Silver Bow is the largest city in Deer Lodge County, with a population of 36,453.
Racetrack is the smallest city in Deer Lodge County.
There are 4 cities in Deer Lodge County, Montana.