John Lewis Hart, also credited as John Hilton was an American film and television actor. In his early career, Hart appeared mostly in Westerns. Although Hart played mostly minor roles in some fairly well known films, he was probably best known for having replaced Clayton Moore in 1952 in the television series, The Lone Ranger for one season from 1952 until 1953.

Hart began his screen career in 1937 with a bit part in Daughter of Shanghai. He continued in a variety of B pictures such as Prison Farm and King of Alcatraz before appearing in two of Cecil B. DeMille's films The Buccaneer and North West Mounted Police. In 1941, Hart's acting career was interrupted when he was drafted into the United States Army. He rose to the rank of first sergeant in the Coast Artillery and eventually served in the Philippines. Following his military service, Hart worked frequently for Sam Katzman; he was given the lead role in the Jack Armstrong film serial. Hart did stunt work and acted in numerous Westerns