| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Beacon Point | city | Montana | United States | 45.39 | -111.36 | 9399 | |
| Beals | city | Montana | United States | 45.74 | -111.82 | 5029 | |
| Bear Creek Village | city | Montana | United States | 48.08 | -113.98 | 3349 | |
| Bear Dance | city | Montana | United States | 47.92 | -114.03 | 3546 | |
| Bearcreek | city | Montana | United States | 45.16 | -109.16 | 5029 | |
| Bearmouth | city | Montana | United States | 46.71 | -113.33 | 4189 | |
| Bearpaw (historical) | city | Montana | United States | 48.23 | -109.52 | 4475 | |
| Beartown | city | Montana | United States | 46.79 | -113.34 | 5029 | |
| Beaver Creek | city | Montana | United States | 46.97 | -109.50 | 4547 | |
| Beaver Creek | city | Montana | United States | 48.55 | -109.79 | 2598 | |
| Beaver Flats (historical) | city | Montana | United States | 45.84 | -104.70 | 3599 | |
| Beaverton | city | Montana | United States | 48.42 | -107.25 | 2509 | |
| Beck (historical) | city | Montana | United States | 47.78 | -111.82 | 4189 | |
| Becket | city | Montana | United States | 46.99 | -108.92 | 4189 | |
| Bedford | city | Montana | United States | 46.36 | -111.55 | 4189 | |
| Beebe | city | Montana | United States | 46.06 | -105.57 | 2700 | |
| Beehive | city | Montana | United States | 45.48 | -109.72 | 5029 | |
| Been (historical) | city | Montana | United States | 47.21 | -104.17 | 2595 | |
| Belfry | city | Montana | United States | 45.14 | -109.01 | 4189 | |
| Belgian Colony (historical) | city | Montana | United States | 48.32 | -112.03 | 3658 | |
| Belgrade | city | Montana | United States | 45.78 | -111.18 | 4471 | |
| Belgrade Junction | city | Montana | United States | 45.78 | -111.28 | 4389 | |
| Belgrade Trailer Court | city | Montana | United States | 45.78 | -111.18 | 4465 | |
| Belgrade Village Mobile Home Park | city | Montana | United States | 45.77 | -111.17 | 4478 | |
| Belinum | city | Montana | United States | 45.78 | -108.50 | 3349 | |
| Belknap | city | Montana | United States | 47.66 | -115.41 | 2509 | |
| Bell Crossing | city | Montana | United States | 46.44 | -114.12 | 3398 | |
| Bell Ranch Colony | city | Montana | United States | 47.13 | -108.92 | 3576 | |
| Belle Creek | city | Montana | United States | 45.14 | -105.11 | 3605 | |
| Belle-Vue Court | city | Montana | United States | 47.69 | -114.14 | 3349 | |
| Bellevue Manor Trailer Park | city | Montana | United States | 48.41 | -115.59 | 2509 | |
| Belltower | city | Montana | United States | 45.64 | -104.38 | 3349 | |
| Belmont | city | Montana | United States | 46.23 | -108.99 | 3638 | |
| Belmont (historical) | city | Montana | United States | 46.66 | -112.32 | 5869 | |
| Belt | city | Montana | United States | 47.39 | -110.93 | 3599 | |
| Belt Creek | city | Montana | United States | 47.55 | -110.96 | 3349 | |
| Belton (historical) | city | Montana | United States | 47.38 | -110.93 | 3749 | |
| Benchland | city | Montana | United States | 47.08 | -110.02 | 4297 | |
| Bend | city | Montana | United States | 47.91 | -115.05 | 3398 | |
| Benrud (historical) | city | Montana | United States | 48.45 | -105.53 | 2749 | |
| Bensons Landing (historical) | city | Montana | United States | 45.69 | -110.53 | 4461 | |
| Benteen | city | Montana | United States | 45.46 | -107.40 | 3349 | |
| Benton Lake (historical) | city | Montana | United States | 47.69 | -111.29 | 3638 | |
| Benz | city | Montana | United States | 46.66 | -105.50 | 2509 | |
| Benzien | city | Montana | United States | 47.26 | -107.68 | 2749 | |
| Bernice | city | Montana | United States | 46.26 | -112.34 | 6148 | |
| Berts Trailer Court | city | Montana | United States | 45.39 | -108.91 | 3540 |