Alexandre Trauner (born Sándor Trau; 3 August 1906 in Budapest, Hungary – 5 December 1993 in Omonville-la-Petite, France) was a Hungarian film production designer. After studying painting at Hungarian Royal Drawing School, he left the country in 1929, fleeing from the antisemitic government of Admiral Horthy.

In Paris, he became the assistant of set designer Lazare Meerson, at the studios in Épinay-sur-Seine working on such films as À nous la liberté (1932) and La Kermesse héroïque (1935). In 1937, he became a chief set designer. Trauner worked with director Marcel Carné for some years on such films as Port of Shadows (Quai des brumes, 1938), Le Jour se lève (1939), and Children of Paradise (Les Enfants du paradis, 1945).