San Antonio is a 1945 American Western film starring Errol Flynn and Alexis Smith. The film was written by W. R. Burnett and Alan Le May and directed in Technicolor by David Butler as well as uncredited Robert Florey and Raoul Walsh.

William Riley Burnett was an American novelist and screenwriter. He is best known for the crime novel Little Caesar, the film adaptation of which is considered the first of the classic American gangster movies.