Salvatore Mineo Jr. (January 10, 1939 – February 12, 1976) was an American actor. He was best known for his role as John "Plato" Crawford in the drama film Rebel Without a Cause (1955), which earned him a nomination for the Academy Award for Best Supporting Actor at age 17, making him the fifth-youngest nominee in the category.

Mineo also starred in films such as Crime in the Streets, Giant (both 1956), Exodus (1960), for which he won a Golden Globe and received a second Academy Award nomination, The Longest Day (1962), John Ford's final western Cheyenne Autumn (1964) and Escape from the Planet of the Apes (1971).