Karlheinz Böhm (sometimes Carl Boehm) (born March 16, 1928 in Darmstadt, Germany) is an Austrian actor. The son of conductor Karl Böhm, he is best known internationally for his role as Mark, the psychopathic protagonist of Peeping Tom, directed by Michael Powell. Before that, he had played the young Emperor Franz Joseph I of Austria in the three Sissi movies.

He also played Jakob Grimm in the 1962 Cinerama spectacular The Wonderful World of the Brothers Grimm and Ludwig van Beethoven in the Walt Disney film The Magnificent Rebel. He appeared as the Nazi-sympathizing son of Lee J. Cobb in the MGM Technicolor remake of The Four Horsemen of the Apocalypse. Between 1974 and 1975, Böhm appeared prominently in four consecutive films from prolific New German Cinema director Rainer Werner Fassbinder: Martha, Effi Briest, Faustrecht der Freiheit (aka Fistfight of Freedom or Fox and his Friends), and Mutter Küsters' Fahrt zum Himmel (Mother Kusters Goes to Heaven).

Since 1981, when he founded Menschen für Menschen ("Humans for Humans"), Böhm has been actively involved in charitable work in Ethiopia.

Karlheinz Böhm has been married to Almaz Böhm, a native of Ethiopia, since 1991. They have two children, Nicolas (born 1990) and Aida (born 1993). Böhm has five more children from previous marriages, among them, the actress Katharina Böhm (born 1964).