SS Athenia was a steam turbine transatlantic passenger liner built in Glasgow, Scotland, in 1923 for the Anchor-Donaldson Line, which later became the Donaldson Atlantic Line. She worked between the United Kingdom and the east coast of Canada until 3 September 1939, when a torpedo from the German submarine U-30 sank her in the Western Approaches.

SS Athenia was the first Donaldson Line ship of that name to be torpedoed and sunk off Inishtrahull, by a German submarine (SM U-53) in 1917; the later SS Athenia, was similarly attacked in 1939.