Once a Hero may refer to:
Once a Hero, an ABC 1987 science fiction comedy television series Once a Hero (novel), a novel by Elizabeth Moon "Once a Hero" (NCIS), an episode of NCIS "Once a Hero" (Hercules: The Legendary Journeys), an episode of Hercules: The Legendary Journeys Once a Hero (film), a 1931 film directed by Fatty Arbuckle It Happened in Hollywood, a 1937 film with the working title Once a Hero