City | 2024 Population |
|---|---|
| Saco | 161 |
| Saddle Butte | 259 |
| Sage Creek Colony | 23 |
| Saltese | 21 |
| Sand Coulee | 245 |
| Sangrey | 584 |
| Santa Rita | 80 |
| Sapphire Ridge | 19 |
| Savage | 354 |
| Scobey | 967 |
| Sedan | 140 |
| Seeley Lake | 1,638 |
| Shawmut | 27 |
| Shelby | 3,317 |
| Shepherd | 666 |
| Sheridan | 785 |
| Sidney | 5,971 |
| Silesia | 6 |
| Silver Gate | 138 |
| Silver Star | 78 |
| Simms | 320 |
| Sleeping Buffalo | 16 |
| Snowslip | 7 |
| Somers | 995 |
| South Browning | 1,566 |
| South Glastonbury | 173 |
| South Hills | 672 |
| Spokane Creek | 588 |
| Springhill | 200 |
| Springwater Colony | 75 |
| Square Butte | 19 |
| St. Ignatius | 847 |
| St. Marie | 531 |
| St. Pierre | 506 |
| St. Regis | 421 |
| Stanford | 431 |
| Starr School | 142 |
| Stevensville | 2,359 |
| Stockett | 148 |
| Stryker | 20 |
| Sun Prairie | 1,115 |
| Sun River | 75 |
| Sunburst | 351 |
| Superior | 1,002 |
| Surprise Creek Colony | 6 |
| Swan Lake | 226 |
| Sweet Grass | 84 |
| Sylvanite | 139 |