Aghios Johannis
| Name | Aghios Johannis |
| Type | Sailing vessel |
| GRT | 20 tons |
| Country |  Greek |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Aghios Johannis
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 5 May 1918 | U 33 (Gustav Sieß) | Sunk | N Crete |
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