Abby Mann was an American film writer and producer. His best known work is the screenplay for Judgment at Nuremberg, which was initially a television drama. Stanley Kramer directed the film adaptation, and Mann received the Academy Award for Best Adapted Screenplay. Other credits include the screenplays for The Marcus-Nelson Murders, The Atlanta Child Murders, Teamster Boss: The Jackie Presser Story, Indictment: The McMartin Trial, and War and Love.

Mann later adapted the play for Broadway (Longacre Theatre). In the introduction to the printed script, Mann credited a conversation with Abraham Pomerantz, U.S. Chief Deputy Counsel, for giving him the initial interest in Nuremberg. 

Working for television, Mann created the CBS television series Kojak. He also directed the NBC miniseries, King.