Ivan Stang (born Douglass St. Clair Smith; August 21, 1953) is an American writer, filmmaker, and broadcaster, best known as the author and publisher of the first screed of the Church of the SubGenius. He is credited with founding "Church" with friend Philo Drummond in 1979, though Stang himself denied this and claimed the organization was founded in 1953 by J. R. "Bob" Dobbs.
Born in Washington, D.C., and raised in Fort Worth, Texas, he attended the St. Mark's School of Texas. Since the publication of the first SubGenius pamphlet in 1980, Stang has embarked on a worldwide crusade (spanning at least three continents) to promote the Church. In May 2006 he finished writing, editing, and designing a new SubGenius book for Thunder's Mouth Press, The SubGenius Psychlopaedia of Slack: The Bobliographon. He has appeared on several national radios and television shows, including The Jon Stewart Show on MTV. Stang is an instructor on the faculty of the Maybe Logic Academy. Both he and J.R. "Bob" Dobbs appear as characters in John Shirley's science fiction novel Kamus of Kadizar: The Black Hole of Carcosa.