To the Devil a Daughter, sometimes stylised as To the Devil... a Daughter, is a 1976 supernatural 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.

An international co-production between the United Kingdom, West Germany, and the United States, the film was produced by Hammer Film Productions and Terra Filmkunst. It 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.

This was the penultimate film made by Hammer Films before The Lady Vanishes (1979) ended their run in the 20th century. It also was the last film by the studio to feature Christopher Lee until The Resident in 2011.