Constantia
| Name | Constantia |
| Type | steamer |
| GRT | 772 tons |
| Country |  British |
| Built | 1890 |
| Builder | Björneborg Mek. Verks., Björneborg |
| Operator | The Shipping Controller (Gellatly, Hankey & Co., mgrs.), London |
| History |
U-boat attacks on steamer Constantia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 8 May 1918 | UB 21 (Bruno Mahn) | Sunk | 2 miles E South Cheek, Robin Hood Bay | Tyne - ? | coal | 3 |
If you can help us with any additional information on this vessel then please contact us.