Martin (also known internationally as Wampyr) is a 1977 American horror film written and directed by George A. Romero, starring John Amplas. The film follows a troubled young man who believes himself to be a vampire. Shot in 1976, Martin was Romero's fifth feature film following his previous film, The Crazies (1973).

Romero said that Martin was the favorite of all his films. The film is also the first collaboration between George Romero and special effects artist Tom Savini. While a prosecution for obscenity did not result, the film was seized and confiscated in the UK under Section 3 of the Obscene Publications Act 1959 during the video nasty panic.