St. Helens
| Name | St. Helens |
| Type | Steamer |
| GRT | 1,497 tons |
| Country |  American |
| Built | 1907 |
| Builder | Harlan & Hollingsworth Corp., Wilmington, De. |
| Operator | Tiltro Limited, Inc., New York |
| History |
U-boat attacks on Steamer St. Helens
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Oct 1917 | U 105 (Friedrich Strackerjan) | Sunk | 100 miles WNW of Cape Villano | 45.57N, 11.19W | Newport - Algiers | 24 |
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