Ionio
| Name | Ionio |
| Type | Steamer |
| GRT | 1,816 tons |
| Country |  Italian |
| Built | 1886 |
| Builder | Wigham Richardson & Co., Newcastle |
| Operator | Cav. G. Truco, Palermo |
| History |
U-boat attacks on Steamer Ionio
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 Nov 1915 | U 38 (Max Valentiner) | Sunk | near Cape Ivi (Algeria) | 36.28N, 00.04E | general cargo | 0 |
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