Jon Stephen Jost (born 16 May 1943 in Chicago) is an American independent filmmaker.

Born in Chicago to a military family, he grew up in Georgia, Kansas, Japan, Italy, Germany and Virginia. He began making films in January 1963 after being expelled from college. In 1965 he was imprisoned by US authorities for 2 years 3 months for refusal to cooperate with the Selective Service system. Self-taught as a filmmaker, he made his first full-length film in 1974, and has since that time focused on a wide range of American issues in his films, at present having made 40 long-form films. Jost's work has shown since 1976 in major film festivals around the world.