| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sabra (historical) | city | Montana | United States | 46.09 | -106.44 | 2700 | |
| Saco | city | Montana | United States | 48.46 | -107.34 | 2509 | |
| Saddle Butte | city | Montana | United States | 48.52 | -109.65 | 3349 | |
| Sadie (historical) | city | Montana | United States | 46.33 | -106.09 | 2509 | |
| Sage Creek Colony | city | Montana | United States | 48.93 | -110.97 | 3412 | |
| Sahara (historical) | city | Montana | United States | 46.74 | -109.15 | 5869 | |
| Saint Clair (historical) | city | Montana | United States | 47.28 | -111.68 | 3398 | |
| Saint Ignatius | city | Montana | United States | 47.32 | -114.09 | 3349 | |
| Saint Johns | city | Montana | United States | 48.80 | -110.01 | 2818 | |
| Saint Marie | city | Montana | United States | 48.40 | -106.53 | 2762 | |
| Saint Mary | city | Montana | United States | 48.74 | -113.43 | 4596 | |
| Saint Peter | city | Montana | United States | 47.30 | -111.92 | 4399 | |
| Saint Phillip | city | Montana | United States | 46.83 | -104.15 | 2893 | |
| Saint Pierre | city | Montana | United States | 48.24 | -109.82 | 4583 | |
| Saint Regis | city | Montana | United States | 47.30 | -115.10 | 2798 | |
| Saint Xavier | city | Montana | United States | 45.46 | -107.72 | 3349 | |
| Saints Rest (historical) | city | Montana | United States | 45.70 | -106.70 | 3349 | |
| Salem | city | Montana | United States | 47.54 | -111.04 | 3405 | |
| Salmon Prairie | city | Montana | United States | 47.63 | -113.79 | 3540 | |
| Salt Creek (historical) | city | Montana | United States | 47.45 | -109.48 | 3398 | |
| Saltese | city | Montana | United States | 47.41 | -115.51 | 4189 | |
| Samples Crossing | city | Montana | United States | 47.27 | -109.72 | 3349 | |
| Sand Coulee | city | Montana | United States | 47.40 | -111.17 | 3618 | |
| Sand Creek (historical) | city | Montana | United States | 47.84 | -105.66 | 2509 | |
| Sand Springs | city | Montana | United States | 47.10 | -107.49 | 3349 | |
| Sanders | city | Montana | United States | 46.29 | -107.10 | 2608 | |
| Sangrey | city | Montana | United States | 48.28 | -109.82 | 3431 | |
| Santa Rita | city | Montana | United States | 48.70 | -112.32 | 4189 | |
| Sapphire Village | city | Montana | United States | 46.89 | -110.25 | 5029 | |
| Sappington | city | Montana | United States | 45.79 | -111.77 | 4353 | |
| Sarpy (historical) | city | Montana | United States | 45.80 | -106.95 | 3599 | |
| Saugus | city | Montana | United States | 46.69 | -105.49 | 2509 | |
| Savage | city | Montana | United States | 47.45 | -104.34 | 1978 | |
| Savoy | city | Montana | United States | 48.47 | -108.54 | 2509 | |
| Sawyers Trailer Park | city | Montana | United States | 47.06 | -109.43 | 4189 | |
| Sayle | city | Montana | United States | 45.23 | -106.00 | 4189 | |
| Saypo | city | Montana | United States | 47.81 | -112.57 | 5029 |