The Witches is a British children's dark fantasy novel by the British writer Roald Dahl. The story is set partly in Norway and partly in England, and features the experiences of a young English boy and his Norwegian grandmother in a world where child-hating societies of witches secretly exist in every country. The witches are ruled by the extremely vicious and powerful Grand High Witch, who arrives in England to organize her plan to turn all of the children in England into mice.

The Witches was originally published in 1983 by Jonathan Cape in London, with illustrations by Quentin Blake (like many of Dahl's works). The book was adapted into an unabridged audio reading by Lynn Redgrave, a stage play and a two-part radio dramatisation for the BBC, a 1990 film directed by Nicolas Roeg which starred Anjelica Huston and Rowan Atkinson, an 2008 opera by Marcus Paus and Ole Paus, and a 2020 film directed by Robert Zemeckis.