Mary Fanny
| Name | Mary Fanny |
| Type | Sailing vessel |
| GRT | 94 tons |
| Country |  British |
| Built | 1862 |
| Builder | ?, Anglesea |
| Operator | Harriet Galsworthy (Arthur Galsworthy), Bideford |
| History | Wooden ketch |
U-boat attacks on Sailing vessel Mary Fanny
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Sep 1918 | UB 64 (Ernst Krieger) | Sunk | Sunk by gunnery 14 miles ESE of the Codling Bank LV | Garston - New Ross | coal |
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