Sidney Harmon (April 30, 1907 – February 29, 1988) was a film producer and screenwriter. Harmon was nominated for the 1942 Academy Award for Best Story for the film The Talk of the Town. He began his career working as a writer on radio and in the theater in the 1930s. Harmon produced Sidney Kingsley's Pulitzer Prize-winning play Men in White.
Born in Poughkeepsie, New York in 1907, Harmon produced Broadway plays throughout the 1930s (1931-1937). Harmon was one of many members of the Group Theatre to move into film. He was active in films from the 1940s to the 1960s. In 1959, he co-founded the Theatre Group at the University of California at Los Angeles with John Houseman and Robert Ryan.
Harmon, with Ryan and others, founded the Oakwood School in 1951.
In retirement, Harmon was active in the cultural life of Palm Springs; he was the first director emeritus of the McCallum Theatre in Palm Desert. The Desert Theatre League's Sidney Harmon Award honored members "in recognition of the advancement of theatrical excellence both on and off the stage."
Harmon died in Rancho Mirage, California on February 29, 1988.