Warsaw
| Name | Warsaw |
| Type | Steamer |
| GRT | 608 tons |
| Country |  British |
| Built | 1864 |
| Builder | MacNab & Co., Greenock |
| Operator | Leith, Hull & Hamburg Steam Packet Co., Ltd. (J. Currie & Co.), Leith |
| History |
U-boat attacks on Steamer Warsaw
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 20 Dec 1917 | UB 31 (Thomas Bieber) | Sunk | Torpedoed 4 miles SExE of Start Point | St. Malo & Brixham - Liverpool | 17 |
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