ORP Dzik (Boar) was a U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.

24 May 1943 Near Cape Spartivento, ORP Dzik fired a 4-torpedo salvo and damaged the Italian oil tanker Carnaro (8357 Gross Register Tonnage).

21 Sep 1943 ORP Dzik fired torpedoes in Bastia harbour, Corsica, France and sank the German tanker Nikolaus (6397, former Greek Nikolaou Ourania) and the German tug Kraft (333 Gross Register Tonnage).

8 Jan 1944 ORP Dzik sank the Greek sailing vessel Eleni (200 Gross Register Tonnage) with gunfire off Lesbos Island, Greece in position 39.37N, 25.43E.

ORP Dzik destroyed or damaged 18 surface ships both German and Italian with a total tonnage of 45,080 tons.