Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Orth (Minn.) | 0 | 0 | |
| Orr (N.D.) | 44 | 0 | |
| Oroville (Wash.) | 262 | 0 | |
| Oroville (Caliif.) | 7 | 0 | |
| Oroville (Calif.) | 3 | 0 | |
| Orono (Minn.) | 8 | 0 | |
| Orofino (Idaho) | 18 | 0 | |
| Orleans (Or.) | 0 | 0 | |
| Oriska (N.D.) | 2 | 0 | |
| Orinoco (Mont.) | 0 | 0 |