Neptuno
| Name | Neptuno |
| Type | Steamer |
| GRT | 321 tons |
| Country |  Portuguese |
| Built | 1867 |
| Builder | |
| Operator | Juand e Freitas Malinez, Funchal |
| History |
U-boat attacks on Steamer Neptuno
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Jan 1918 | U 152 (Constantin Kolbe) | Sunk | stopped and scuttled 140 miles off Lisbon | 37.12N, 11.37W | Lisbon - Funchal | general cargo including food and mail | 0 |
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