Satan (German: Satanas) is a 1920 silent German drama film in three parts, directed by F. W. Murnau, written and produced by Robert Wiene. It was one of Murnau's first directorial attempts, and along with his 1920 Der Januskopf, is today considered a lost film. The film starred Fritz Kortner, Sadjah Gezza and Conrad Veidt. Karl Freund was the cinematographer.

Only a brief fragment of the film is kept in the Cinémathèque Française film archive. Although most of the film no longer exists, it does not seem to be a true horror film, in that allegedly only the third segment of the film deals with the Devil. Robert Wiene probably had more control over the film than Murnau did, since he wrote the screenplay. Murnau hired Conrad Veidt to work with him in his next film, the 1920 Der Januskopf (which also featured Bela Lugosi).