RMS Empress of Britain was a steam turbine ocean liner built between 1928 and 1931 by John Brown shipyard in Scotland, owned by the Canadian Pacific Railway Company and operated by Canadian Pacific Steamship Company. She was the second of three Canadian Pacific ships named Empress of Britain,[1] which provided scheduled trans-Atlantic passenger service from spring to autumn between Canada and Europe from 1931 until 1939.

In her time Empress of Britain was the largest, fastest and most luxurious ship between the United Kingdom and Canada, and the largest ship in the Canadian Pacific fleet. She was torpedoed on 28 October 1940 by U-32 and sank. At 42,348 GRT she was the largest liner lost in the Second World War and the largest ship sunk by a U-boat.