3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Butte-Silver Bow | 1 | 35,933 | 34,573 | 0.64% | 50 | 716 | Township |
| Anaconda-Deer Lodge County | 2 | 10,005 | 9,423 | 0.98% | 14 | 737 | Township |
| Walkerville | 3 | 662 | 637 | 0.61% | 297 | 2 | Town |
Butte-Silver Bow is the largest city in Deer Lodge County, with a population of 35,933.
Walkerville is the smallest city in Deer Lodge County, with a population of 662.
There are 3 cities in Deer Lodge County, Montana.