Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Ottumwa (Iowa) | 11 | 0 | |
| Otter Tail (Minn.) | 1 | 0 | |
| Otter Tail (B.C.) | 1 | 0 | |
| Otter Creek (Minn.) | 0 | 0 | |
| Otter (B.C.) | 37 | 0 | |
| Otranto (Iowa) | 0 | 0 | |
| Otis (Wis.) | 0 | 0 | |
| Otis Orchards (Wash.) | 3 | 0 | |
| Othello (Wash.) | 46 | 0 | |
| Oswego (N.D.) | 0 | 0 |