Mientji
| Name | Mientji |
| Type | Sailing vessel |
| GRT | 120 tons |
| Country |  British |
| Built | 1913 |
| Builder | van der Werf, Stadskanaal |
| Operator | Admiralty requisition (Livingstone & Sons), London |
| History | Steel-hulled. |
U-boat attacks on Sailing vessel Mientji
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 20 May 1917 | UC 36 (Gustav Buch) | Sunk | Stopped and scuttled 25 miles from Les Hannois LH, Guernsey | St. Malo - Fowey | in ballast | 0 |
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