Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Porto Rico (B.C.) | 19 | 0 | |
| Portola (Wash.) | 0 | 0 | |
| Portsmouth (Iowa) | 0 | 0 | |
| Portsmouth Mine (Minn.) | 0 | 0 | |
| Post Falls (Idaho) | 38 | 0 | |
| Post (Mont.) | 2 | 0 | |
| Postville (Iowa) | 0 | 0 | |
| Potlatch (Idaho) | 11 | 0 | |
| Potomac (Mont.) | 0 | 0 | |
| Potter (Iowa) | 0 | 0 |