Re Umberto
| Name | Re Umberto |
| Type | Passenger steamer |
| GRT | 2,952 tons |
| Country |  Italian |
| Built | 1892 |
| Builder | G. Ansaldo & Co., Sesti Ponente |
| Operator | Semidei & Ferrari, Genoa |
| History |
U-boat attacks on Passenger steamer Re Umberto
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 Dec 1915 | UC 14 (Cäsar Bauer) | Sunk | Mined off Cape Linguetta |
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