Marty Smith (November 26, 1956 – April 27, 2020) was an American professional motocross racer. He competed in the AMA Motocross Championships from 1974 to 1981, most prominently as a member of the Honda factory racing team with whom he won three AMA National Motocross championships. With his long hair and Southern California surfer looks, he was a popular figure among race fans.