| City | County | 2026 Pop. ↓ |
|---|---|---|
| Dillon | Beaverhead County | 4,359 |
| Deer Lodge | Powell County | 3,020 |
| Darby | Ravalli County | 907 |
| Dutton | Teton County | 320 |
| Drummond | Granite County | 304 |
| Denton | Fergus County | 208 |
| Dupuyer | Pondera County | 161 |
| Dayton | Lake County | 127 |
| Dodson | Phillips County | 122 |
| De Borgia | Mineral County | 44 |
| Dell | Beaverhead County | 41 |
| Dewey | Beaverhead County | 33 |
| Deerfield Colony | Fergus County | 25 |
| Danvers | Fergus County | 7 |