Agios Constantinos
| Name | Agios Constantinos |
| Type | Sailing vessel |
| GRT | 14 tons |
| Country |  Greek |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Agios Constantinos
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 11 Jul 1918 | k.u.k. U27 (Josef Holub) | Sunk | 35.38N, 25.12E | 0 | |||
| or AGIOS KONSTANTINOS | ||||||||
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