City | 2024 Population |
|---|---|
| Salmon | 3,354 |
| Sandpoint | 10,455 |
| Shelley | 5,299 |
| Shoshone | 1,747 |
| Silverton | 552 |
| Smelterville | 721 |
| Smiths Ferry | 56 |
| Soda Springs | 3,187 |
| Spencer | 29 |
| Spirit Lake | 2,522 |
| St. Anthony | 4,130 |
| St. Charles | 193 |
| St. Maries | 2,509 |
| Stanley | 119 |
| Star | 17,961 |
| State Line | 37 |
| Stites | 194 |
| Sugar City | 2,243 |
| Sun Valley | 1,764 |
| Swan Valley | 323 |
| Sweetwater | 80 |