To the Devil a Daughter, sometimes stylised as To the Devil... a Daughter, is a 1976 horror film directed by Peter Sykes and starring Richard Widmark, Christopher Lee, Honor Blackman, Nastassja Kinski, and Denholm Elliott. Based on the 1953 novel of the same name by Dennis Wheatley, it follows an American occult researcher in England who attempts to save a young girl preyed upon by a Satanic cult led by a fallen Catholic priest.

Produced by Hammer Film Productions and the West German studio Terra Filmkunst, the film was originally devised by Hammer as a television episode in a series based on Wheatley's novels, which never materialized. Wheatley's book was subsequently adapted as a feature film co-written by Christopher Wicking. The film was shot in Bavaria and London in 1975, and features an original musical score by Swiss-American composer Paul Glass. It premiered in London in February 1976, and went on to become one of Hammer Studios' most profitable films of the 1970s.

The film was followed by The Lady Vanishes (1979 film) what was the last film made by Hammer Films before the studio was revived in the 21st century, and the last film by the studio to feature Christopher Lee until The Resident in 2011.