Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Oswego (Mont.) | 71 | 0 | |
| Ostrander (Wash.) | 7 | 0 | |
| Osterdock (Iowa) | 0 | 0 | |
| Ossian (Iowa) | 0 | 0 | |
| Osseo (Minn.) | 126 | 0 | |
| Osseo Line Junction (Minn.) | 1 | 0 | |
| Osoyoos District (B.C.) | 1 | 0 | |
| Osoyoos (B.C.) | 1 | 0 | |
| Osoovos Lake (Wash.) | 2 | 0 | |
| Oso (Wash.) | 61 | 0 |