| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| DY Junction | city | Montana | United States | 47.80 | -108.63 | 3349 | |
| Dagmar | city | Montana | United States | 48.58 | -104.20 | 2007 | |
| Dahl Place | city | Montana | United States | 45.64 | -110.43 | 5869 | |
| Dailey (historical) | city | Montana | United States | 45.29 | -110.84 | 5029 | |
| Daleview | city | Montana | United States | 48.91 | -104.93 | 2509 | |
| Dalys | city | Montana | United States | 45.09 | -112.78 | 5869 | |
| Danielsville | city | Montana | United States | 46.29 | -113.02 | 6709 | |
| Danvers | city | Montana | United States | 47.23 | -109.72 | 3599 | |
| Darby | city | Montana | United States | 46.02 | -114.18 | 4189 | |
| Darrel (historical) | city | Montana | United States | 46.75 | -108.71 | 4189 | |
| Dayton | city | Montana | United States | 47.87 | -114.28 | 2890 | |
| Daytown (historical) | city | Montana | United States | 46.66 | -111.70 | 4189 | |
| De Borgia | city | Montana | United States | 47.38 | -115.35 | 3349 | |
| De Smet | city | Montana | United States | 46.93 | -114.10 | 3349 | |
| Dean | city | Montana | United States | 45.40 | -109.69 | 5295 | |
| Dearborn (historical) | city | Montana | United States | 47.20 | -112.09 | 4189 | |
| Decker | city | Montana | United States | 45.01 | -106.86 | 3599 | |
| Deep Creek (historical) | city | Montana | United States | 46.32 | -111.42 | 4258 | |
| Deer Lodge | city | Montana | United States | 46.40 | -112.73 | 5029 | |
| Deer Lodge County | city | Montana | United States | 46.13 | -112.94 | 5341 | |
| Deer Park | city | Montana | United States | 46.13 | -111.27 | 4199 | |
| Deerfield Colony | city | Montana | United States | 47.26 | -109.68 | 3464 | |
| Deertail Indian Village (historical) | city | Montana | United States | 48.09 | -105.07 | 1938 | |
| Del Bonita | city | Montana | United States | 49.00 | -112.79 | 4327 | |
| Delano Heights (historical) | city | Montana | United States | 48.00 | -106.50 | 2509 | |
| Delano Place | city | Montana | United States | 45.90 | -112.85 | 6998 | |
| Dell | city | Montana | United States | 44.72 | -112.70 | 6007 | |
| Delphia | city | Montana | United States | 46.50 | -108.22 | 3349 | |
| Demers (historical) | city | Montana | United States | 48.88 | -112.17 | 4189 | |
| Demersville (historical) | city | Montana | United States | 48.16 | -114.27 | 2900 | |
| Dennison (historical) | city | Montana | United States | 46.96 | -111.94 | 4189 | |
| Denton | city | Montana | United States | 47.32 | -109.95 | 3681 | |
| Devon | city | Montana | United States | 48.47 | -111.48 | 3349 | |
| Dewey | city | Montana | United States | 45.78 | -112.86 | 5912 | |
| Diamond City | city | Montana | United States | 46.60 | -111.42 | 5029 | |
| Diamond Valley | city | Montana | United States | 47.84 | -111.49 | 3700 | |
| Dillon | city | Montana | United States | 45.22 | -112.64 | 5141 | |
| Divide | city | Montana | United States | 45.75 | -112.75 | 5400 | |
| Dixon | city | Montana | United States | 47.32 | -114.31 | 2611 | |
| Doak Trailer Court | city | Montana | United States | 46.55 | -110.90 | 5098 | |
| Dodge Summit | city | Montana | United States | 48.92 | -115.36 | 6197 | |
| Dodgetown (historical) | city | Montana | United States | 46.31 | -109.36 | 4189 | |
| Dodson | city | Montana | United States | 48.40 | -108.24 | 2509 | |
| Dogtown (historical) | city | Montana | United States | 45.71 | -111.17 | 5029 | |
| Dogtown (historical) | city | Montana | United States | 48.47 | -108.62 | 2509 | |
| Donald | city | Montana | United States | 45.84 | -112.43 | 6709 | |
| Donlan | city | Montana | United States | 47.33 | -114.94 | 2798 | |
| Donovan Park (historical) | city | Montana | United States | 47.42 | -111.27 | 3599 | |
| Dooley | city | Montana | United States | 48.88 | -104.39 | 2539 | |
| Dotsonville (historical) | city | Montana | United States | 46.60 | -112.10 | 4304 | |
| Douglas (historical) | city | Montana | United States | 48.86 | -113.22 | 5029 | |
| Dover | city | Montana | United States | 47.22 | -110.27 | 4189 | |
| Dovetail (historical) | city | Montana | United States | 47.34 | -108.21 | 2798 | |
| Drexel | city | Montana | United States | 47.33 | -115.25 | 3349 | |
| Drummond | city | Montana | United States | 46.67 | -113.15 | 4189 | |
| Dry Lake | city | Montana | United States | 48.05 | -108.65 | 3490 | |
| Dryer Place | city | Montana | United States | 47.74 | -107.57 | 2762 | |
| Dryhead (historical) | city | Montana | United States | 45.18 | -108.27 | 5869 | |
| Dryland (historical) | city | Montana | United States | 47.01 | -108.95 | 4189 | |
| Duffy Trailer Court | city | Montana | United States | 45.83 | -109.96 | 4199 | |
| Duncan (historical) | city | Montana | United States | 48.20 | -114.30 | 3349 | |
| Duncan Ranch Colony | city | Montana | United States | 46.44 | -110.02 | 4399 | |
| Dunham | city | Montana | United States | 47.61 | -114.12 | 3349 | |
| Dunkirk | city | Montana | United States | 48.48 | -111.66 | 3349 | |
| Dunmore | city | Montana | United States | 45.68 | -107.50 | 3349 | |
| Dupuyer | city | Montana | United States | 48.19 | -112.50 | 4189 | |
| Durant | city | Montana | United States | 46.02 | -112.79 | 5186 | |
| Durham | city | Montana | United States | 48.52 | -113.12 | 5029 | |
| Dutch Hill (historical) | city | Montana | United States | 46.32 | -114.19 | 4189 | |
| Dutton | city | Montana | United States | 47.84 | -111.71 | 3730 | |
| Dutton | city | Montana | United States | 46.60 | -112.95 | 4189 |