14 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Dillon | Beaverhead County | 4,332 |
| Deer Lodge | Powell County | 3,002 |
| Darby | Ravalli County | 892 |
| Dutton | Teton County | 316 |
| Drummond | Granite County | 299 |
| Denton | Fergus County | 213 |
| Dupuyer | Pondera County | 151 |
| Dodson | Phillips County | 126 |
| Dayton | Lake County | 119 |
| De Borgia | Mineral County | 42 |
| Dell | Beaverhead County | 38 |
| Dewey | Beaverhead County | 31 |
| Deerfield Colony | Fergus County | 23 |
| Danvers | Fergus County | 7 |