Madonna
| Name | Madonna |
| Type | Sailing vessel |
| GRT | 455 tons |
| Country |  Swedish |
| Built | 1880 |
| Builder | S. Johnsen, Grimstad |
| Operator | Carl Johansson, Kalmar |
| History | Wooden bark. |
U-boat attacks on Sailing vessel Madonna
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Jul 1915 | U 6 (Reinhold Lepsius) | Sunk | Stopped and sunk in the North Sea | Hälsingborg - West Hartlepool | pit props | 0 |
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