Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Ohop (Wash.) | 0 | 0 | |
| Oil Spur (Mont.) | 0 | 0 | |
| Oil Station (Wash.) | 8 | 0 | |
| Oilton (Or.) | 1 | 0 | |
| Ojata (N.D.) | 46 | 0 | |
| Oka (Mont.) | 0 | 0 | |
| Okabena (Minn.) | 0 | 0 | |
| Okanagan (Wash.) | 3 | 0 | |
| Okanogan (Wash.) | 54 | 0 | |
| Okaton (S.D.) | 0 | 0 |