O.C. and Stiggs is a 1987 American teen comedy film directed by Robert Altman, based on two characters that were originally featured in a series of stories published in National Lampoon magazine. The film stars Daniel H. Jenkins and Neill Barry as the title characters. Other members of the cast include Paul Dooley, Jane Curtin, Martin Mull, Dennis Hopper, Ray Walston, Louis Nye, Melvin Van Peebles, Tina Louise, Cynthia Nixon, Jon Cryer and Bob Uecker.

The film, a raunchy teen comedy described by the British Film Institute as "probably Altman's least successful film", was shot in 1983, but not released until long after post-production was completed (copyrighted in 1985). MGM shelved it for a couple of years, finally giving it a limited theatrical release in 1987 and 1988.