Alessandra
| Name | Alessandra |
| Type | Sailing vessel |
| GRT | 2,394 tons |
| Country |  Italian |
| Built | 1884 |
| Builder | Oswald, Mordaunt & Co., Southampton |
| Operator | Aless. Piaggio, Genoa |
| History | Iron-hulled ship-rigged sailing vessel. Built as Manydown. |
U-boat attacks on Sailing vessel Alessandra
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Mar 1918 | U 153 (Gernot Goetting) | Sunk | Stopped and sunk by gunnery and explosive charge W of Madeira | 33.21N, 21.00W | Gibraltar - New York | in ballast |
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