L. M. Kit Carson (born 1941) is an American actor and screenwriter.
He has a son, actor Hunter Carson, with ex-wife Karen Black.
Carson first gained the notice of the film world when he starred in Jim McBride's mockumentary David Holzman's Diary in 1967 as the title character, a man so obsessed with filmmaking that he allows his obsession to take over his life and ruin his relationships. The two would team up again in 1983, sharing screenplay credits for the remake of Jean-Luc Godard's Breathless, which starred Richard Gere, Valérie Kaprisky and, in a bit part, brother David Lee Carson as Mister Maurice. His break-out accomplishment was the screenplay for Paris, Texas in 1984, based on Sam Shepard's play of the same name, and featuring son Hunter Carson in his film debut. He is best known for penning the screenplay for the 1986 horror film satire The Texas Chainsaw Massacre 2.