James Henry Kinmel Sangster (2 December 1927 – 19 August 2011) was a British screenwriter and director, most famous for his work on the initial horror films made by the British company Hammer Films, including The Curse of Frankenstein (1957) and Dracula (1958).

All three of the films he directed featured actor Ralph Bates, a friend of Sangster's and one of Hammer's better-known performers for the company during the 1970s.

His other scriptwriting credits included The Siege of Sidney Street (1960), which starred Donald Sinden and in which Sangster appeared as Winston Churchill.

His many television screenwriting credits include Kolchak: The Night Stalker, Movin' On, The Magician, B. J. and the Bear, Most Wanted, Ironside, McCloud, The Six Million Dollar Man and Wonder Woman.

His other books include the novel Your Friendly Neighborhood Death Peddler, the non-fiction memoir Do You Want it Good or Tuesday?