Aspen
| Name | Aspen |
| Type | Steamer |
| GRT | 3,103 tons |
| Country |  Swedish |
| Built | 1897 |
| Builder | J. L. Thompson & Sons, Ltd., Sunderland |
| Operator | Förnyade Ångfartygs A/B Viking (J. M. Dannberg), Göteborg |
| History |
U-boat attacks on Steamer Aspen
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 May 1917 | UC 31 (Otto von Schrader) | Damaged | Torpedoed 20 miles E of the Orkneys. Towed in to Kirkwall. | Philadelphia - Stockholm | wheat |
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