SS Athos was a French cargo-passenger ship of the Messageries Maritimes, launched in 1914, that was sunk in the Mediterranean by the German submarine SM U-65 during World War I.

Construction of the ship started on 25 July 1914 in Dunkirk, but was halted when the city was bombed during the First Battle of Ypres.

At 12:27 on 17 February 1917, during her third voyage, Athos was torpedoed by the German submarine SM U-65 commanded by Hermann von Fischel, while 180 nautical miles (330 km; 210 mi) east by south of Malta.

The ship sank in 14 minutes taking with her 754 people, including the captain and 11 crew members.

The survivors were picked up by the escort ships Enseigne Henry and Mameluck, as well as the gunboat Moqueuse and the torpedo-boat Baliste.