Rosario
| Name | Rosario |
| Type | Sailing vessel |
| GRT | 1,565 tons |
| Country |  Uruguayan |
| Built | 1879 |
| Builder | A. McMillan & Son, Dumbarton |
| Operator | I. & B. Debernardia & Dodero Hnos., Montevideo |
| History | Iron-hulled bark. Built as MacMillian. |
U-boat attacks on Sailing vessel Rosario
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Jun 1917 | UC 72 (Ernst Voigt) | Sunk | Stopped and scuttled 80 miles off the Gironde | New York - ? |
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