San Giorgio
| Name | San Giorgio |
| Type | Sailing vessel |
| GRT | 258 tons |
| Country |  Italian |
| Built | 1915 |
| Builder | F. Celli, Viareggio |
| Operator | I. Sanducci, Viareggio |
| History | Wooden brigantine. |
U-boat attacks on Sailing vessel San Giorgio
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Nov 1916 | U 21 (Otto Hersing) | Sunk | Stopped and sunk N of Sicily | 38.16N, 10.57E |
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