Vasilefs Constantinos
| Name | Vasilefs Constantinos |
| Type | Steamer |
| GRT | 4,070 tons |
| Country |  Greek |
| Built | 1913 |
| Builder | Short Bros., Ltd., Sunderland |
| Operator | S. G. Embiricos, Andros |
| History |
U-boat attacks on Steamer Vasilefs Constantinos
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Apr 1917 | UB 43 (Hans von Mellenthin) | Sunk | Ionian Sea, about 45 miles SW of Akra Akritas | Piraeus - ? |
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