Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Orient (S.D.) | 0 | 0 | |
| Orient (Wash.) | 26 | 0 | |
| Orillia (Wash.) | 23 | 0 | |
| Orin (Wash.) | 15 | 0 | |
| Orinoco (Mont.) | 0 | 0 | |
| Oriska (N.D.) | 2 | 0 | |
| Orleans (Or.) | 0 | 0 | |
| Orofino (Idaho) | 18 | 0 | |
| Orono (Minn.) | 8 | 0 | |
| Oroville (Calif.) | 3 | 0 |