Port Jackson
| Name | Port Jackson |
| Type | Sailing vessel |
| GRT | 2,309 tons |
| Country |  British |
| Built | 1882 |
| Builder | Alexander Hall & Co., Aberdeen |
| Operator | Swift SS. Co., Ltd. (Hessler & Co.), West Hartlepool |
| History | Iron-hulled, four-masted bark. |
U-boat attacks on Sailing vessel Port Jackson
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Apr 1917 | U 67 (Hans Nieland) | Sunk | Torpedoed 180 miles WxN of Fastnet | 51° 00'N, 14° 02'W | Buenos Aires - Cork | maize | 14 |
| Also said to have been sunk at 16.20W | ||||||||
Position of attack on Port Jackson
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