Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Skamania (Wash.) | 61 | 0 | |
| Skagit Valley (Wash.) | 11 | 0 | |
| Skagit River (Wash.) | 3 | 0 | |
| Skadat (Wash.) | 0 | 0 | |
| Sixth Avenue (Tacoma, Wash.) | 1 | 0 | |
| Sixteen (Mont.) | 0 | 0 | |
| Sitka (S.D.) | 0 | 0 | |
| Sisseton (S.D.) | 0 | 0 | |
| Sipple (Mont.) | 0 | 0 | |
| Sioux Falls (S.D.) | 705 | 0 |