Jimmy Sangster (born 2 December 1927) is an English screenwriter and director.

He is best known for his work for Hammer Film Productions, for whom he scripted many of their most successful and still-famous horror films, including The Curse of Frankenstein (1957) and Dracula (1958) (US: Horror of Dracula). He originally worked as a production assistant at the studio, as well as assistant director, second unit director and production manager. He later turned to direction with The Horror of Frankenstein and Lust for a Vampire (both 1970) for the studio, but with far less success. His third (and last) film as director was 1972's Fear In The Night, which resurrected the psychological woman-in-peril thriller Sangster had begun with his script for Taste Of Fear in 1961. All three of Sangster's films as director featured the actor Ralph Bates, one of Hammer's best-known actors of the latter period of the company.

He worked as a production assistant at Hammer Films. His duties included assistant director, second unit director and production manager. For an upcoming project the head of Hammer suggested that Sangster try his hand at writing; if he liked Sangster's script, Hammer would buy it. This began Jimmy Sangster's career as a writer, the profession he is best known for. His early scripts were not only for Hammer, but some of Hammer's competitors as well.

Wrote an autobiography called "Do You Want It Good or Tuesday?," which was published in 1997.