Towns
| State | City/Town | Town Title |
|---|---|---|
| Idaho | Ririe | Ririe, ID |
| Idaho | Roberts | Roberts, ID |
| Idaho | Rockland | Rockland, ID |
| Idaho | Rogerson | Rogerson, ID |
| Idaho | Rupert | Rupert, ID |
| Idaho | Sagle | Sagle, ID |
| Idaho | Saint Anthony | Saint Anthony, ID |
| Idaho | Saint Charles | Saint Charles, ID |
| Idaho | Saint Maries | Saint Maries, ID |
| Idaho | Salmon | Salmon, ID |
| Idaho | Sandpoint | Sandpoint, ID |
| Idaho | Santa | Santa, ID |
| Idaho | Shelley | Shelley, ID |
| Idaho | Shoshone | Shoshone, ID |
| Idaho | Silverton | Silverton, ID |
| Idaho | Smelterville | Smelterville, ID |
| Idaho | Soda Springs | Soda Springs, ID |
| Idaho | Spencer | Spencer, ID |
| Idaho | Spirit Lake | Spirit Lake, ID |
| Idaho | Springfield | Springfield, ID |
| Idaho | Stanley | Stanley, ID |
| Idaho | Star | Star, ID |
| Idaho | Stites | Stites, ID |
| Idaho | Sugar City | Sugar City, ID |
| Idaho | Sun Valley | Sun Valley, ID |