Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| O'Brien Mine (Minn.) | 1 | 0 | |
| Oberon (N.D.) | 0 | 0 | |
| Oatland (N.D.) | 2 | 0 | |
| Oasis (Or.) | 2 | 0 | |
| Oalcan (Wash.) | 1 | 0 | |
| Oakwood (Wis.) | 0 | 0 | |
| Oakville (Wash.) | 24 | 0 | |
| Oakville (Or.) | 0 | 0 | |
| Oakton (Iowa) | 0 | 0 | |
| Oaksdale (Wash.) | 0 | 0 |