Rosario
| Name | Rosario |
| Type | Steamer |
| GRT | 1,821 tons |
| Country |  British |
| Built | 1900 |
| Builder | Blyth SB. Co., Ltd., Blyth |
| Operator | Orders & Handford SS. Co., Ltd. (Orders & Handford), Newport |
| History |
U-boat attacks on Steamer Rosario
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Aug 1917 | UC 55 (Horst Rühle von Lilienstern) | Sunk | torpedoed SW of Ireland | Huelva - Troon | ore | 20 | |
| Master and a fireman taken prisoner. | ||||||||
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