The Marchioness
| Name | The Marchioness |
| Type | Steamer |
| GRT | 553 tons |
| Country |  British |
| Built | 1899 |
| Builder | Ailsa Shipbuilding Co., Troon |
| Operator | John Hay, Glasgow |
| History |
U-boat attacks on Steamer The Marchioness
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 20 Oct 1916 | UB 18 (Otto Steinbrinck) | Sunk | 30 miles NW of Fecamp | Glasgow - Fécamp | coal | 0 |
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