Ewald von Demandowsky (October 21, 1906 – October 7, 1946) was a German film producer who held the office of a Nazi German Reichsfilmdramaturg and was head of production at the Tobis Film company in the Third Reich.
Demandowsky was born in Berlin. Already a member of the Nazi Party in 1930, he gained an employment as a cultural-political editor of the Völkischer Beobachter newspaper. In 1937 he was appointed Reichsfilmdramaturg subordinate to the Ministry of Public Enlightenment and Propaganda and served to abort unwanted filming projects at the behest of Reich Minister Joseph Goebbels. Two years later he became head of Tobis Filmkunst, then the second largest German film production company after Universum Film AG. He produced a number of notorious Nazi propaganda films, including Ohm Krüger and Ich klage an. Commissioned as a SS officer, von Demandowsky had a love affair with rising star Hildegard Knef in the latter part of World War II.
According to Knef, Demandowsky assigned to the Volkssturm militia at the end of the war fled from Berlin, he surrendered and was transferred to a prisoner of war by the Polish Armed Forces but soon after was released to return to Berlin. In 1946 he was again arrested by US military police and handed over to the Soviet Military Administration. Demandowsky was tried for fasistic war propaganda and sentenced to death by a Soviet Military Tribunal and shot on 7 October 1946 in Berlin-Lichtenberg.
In the early 1990s Demandowsky was rehabilitated by the public prosecutor of the Russian Federation (main military prosecutor) in accordance with article 3 letter a of the Act of the Russian Federation on the rehabilitation of victims of political reprisals of 18 October 1991.