Leontine
| Name | Leontine |
| Type | Sailing vessel |
| GRT | 124 tons |
| Country |  French |
| Built | 1878 |
| Builder | G. Beck, Dunkerque |
| Operator | Armement Bourgeois, Gravelines |
| History | Wooden schooner. |
U-boat attacks on Sailing vessel Leontine
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Jan 1917 | UC 21 (Reinhold Saltzwedel) | Sunk | Bay of Biscay |
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