Martin Gottfried Weiss, alternatively spelled Weiß (3 June 1905 – 29 May 1946), was the commandant of the Dachau concentration camp in 1945 at the time of his arrest. He also served from April 1940 until September 1942 as the commandant of Neuengamme concentration camp, and later, from November 1943 until May 1944, as the fourth commandant of Majdanek concentration camp. He was executed for war crimes.