HMS Trump (pennant number P333) was a British submarine of the third group of the T class. She was built by Vickers Armstrong, Barrow, and launched on 25 March 1944. So far she has been the only ship of the Royal Navy to bear the name Trump. She spent the majority of her life attached to the 4th Submarine division based in Australia. She was kept in service following the war and was refitted for greater underwater performance, and was the final RN submarine to be posted in Australia, departing in January 1969. She was sold off and broken up for scrap in August 1971.