Saint Leon
| Name | Saint Leon |
| Type | Sailing vessel |
| GRT | 230 tons |
| Country |  French |
| Built | 1905 |
| Builder | E. Capon & fils, Fécamp |
| Operator | Joseph Gosselin, Fécamp |
| History | Wooden schooner. |
U-boat attacks on Sailing vessel Saint Leon
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 31 Jan 1917 | U 55 (Wilhelm Werner) | Sunk | 12 miles NNW of the Pendeen LH | 50° 21'N, 5° 48'W |
Position of attack on Saint Leon
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