Alucarda (Spanish: Alucarda, la hija de las tinieblas, or Alucarda, the daughter of darkness) is a 1977 English-language Mexican supernatural horror film directed by Juan López Moctezuma, and starring Tina Romero, Claudio Brook, Susana Kamini, and David Silva. A loose adaptation of Carmilla (1872), it revolves around two teenage orphan girls living in a Catholic convent, who unleash a demonic force and become possessed.

Though a Mexican production, the film was shot in English. Internationally, it was released under several alternate titles, including Innocents from Hell and Sisters of Satan. The film has been noted by film scholars for its themes regarding national tradition versus modernity, as well as the tensions between science and religion, and the failures of both. Because of its depiction of nuns in emotionally-heightened, supernatural situations, the film has been associated with the nunsploitation genre.