Iona
| Name | Iona |
| Type | Steamer |
| GRT | 3,344 tons |
| Country |  British |
| Built | 1892 |
| Builder | Gourlay Bros. & Co., Dundee |
| Operator | Cairn Line of Steamships, Ltd. (Cairns, Noble & Co. ), Dundee |
| History |
U-boat attacks on Steamer Iona
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Jun 1915 | U 19 (Constantin Kolbe) | Sunk | 22 miles SSE of Fair Isle | 59.13N, 01.12W | Middlesbrough - Montreal | general cargo | 0 |
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