Z31 was a German Type 1936A (Mob) destroyer, which was completed in 1942 and served with the Kriegsmarine during the Second World War. She was constructed in Germany as part of Plan Z, and commissioned 11 April 1942. She spent much of the war in Arctic and Norwegian waters, taking part in the Battle of the Barents Sea on 31 December 1942. She survived the war, and was passed on to the French Navy as a war prize, serving under the name Marceau until 1958.

The Type 1936A destroyers, also known as the Z23 class, were a group of fifteen destroyers built for the Nazi Germany's Kriegsmarine from 1938 to 1943. They were known to the Allies as the Narvik class. In common with other German destroyers launched after the start of World War II, the Narviks were unnamed, known only by their hull numbers – Z23 to Z39.