Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Orin (Wash.) | 15 | 0 | |
| Orillia (Wash.) | 23 | 0 | |
| Orient (Wash.) | 26 | 0 | |
| Orient (S.D.) | 0 | 0 | |
| Orfordville (Wis.) | 0 | 0 | |
| Orenco (Or.) | 4 | 0 | |
| Oregon Slough (Or.) | 4 | 0 | |
| Oregon Cooperage Spur (Or.) | 0 | 0 | |
| Oregon (567) | 192 | 0 | |
| Ordean (Mont.) | 3 | 0 |