Rio Branco
| Name | Rio Branco |
| Type | Steamer |
| GRT | 2,258 tons |
| Country |  Brazilian |
| Built | 1894 |
| Builder | Craig, Taylor & Co., Stockton |
| Operator | Nisario Gurgel, Rio de Janeiro |
| History |
U-boat attacks on Steamer Rio Branco
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 May 1916 | UB 27 (Victor Dieckmann) | Sunk | Torpedoed 50 miles E by N of Longstone
| Christiania - Hull | general | 0 |
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