Abby Mann (Philadelphia, December 1-1927 – Beverly Hills, 25 March 2008) was a film producer and screenwriter.

Son of Russian Jewish immigrants, won an Academy Award for best adapted screenplay in 1961 by the judgment at Nuremberg, film directed by Stanley Kramer. Mann emphasized by use ethical content topics in scripts for film and television, on figures highlighted as Martin Luther King, Simon Wiesenthal (Murderers Among Us: The Simon Wiesenthal Story) and Jimmy Hoffa. Also gave life to the character of a film, The Marcus-Nelson Murders, which would later become a popular series of television in which the protagonist, a New York detective was incarnated by Telly Savalas in Kojak.