Iris
| Name | Iris |
| Type | Sailing vessel |
| GRT | 75 tons |
| Country |  British |
| Built | 1877 |
| Builder | ?, Rye |
| Operator | Francis Pim, Poole |
| History | Wooden ketch |
U-boat attacks on Sailing vessel Iris
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 8 May 1917 | UC 26 (Matthias Graf von Schmettow) | Sunk | off Cherbourg | 4 | |||
| Missing vessel. UC 26 claims to have sunk a sailing vessel on May 8. It is possible that it is the Iris which disappeared at about that time. | ||||||||
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