Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Omemee (N.D.) | 40 | 0 | |
| Omega (Idaho) | 0 | 0 | |
| Omans (Wash.) | 2 | 0 | |
| Omak (Wash.) | 120 | 0 | |
| Omaha (Neb.) | 18 | 0 | |
| Omaha Jct (Wis.) | 0 | 0 | |
| Olympia (Wash.) | 98 | 0 | |
| Olympia Spur (Wash.) | 0 | 0 | |
| Olympia Plywood Co Spur (Wash.) | 0 | 0 | |
| Olympia (Pa.) | 1 | 0 |