Repulsion is a 1965 British psychological horror thriller film directed by Roman Polanski, and starring Catherine Deneuve. Based on a story written by Polanski and Gérard Brach, the plot follows Carol, a withdrawn, disturbed young woman who, when left alone in the apartment she shares with her sister, is subject to a number of nightmarish experiences. The film focuses on the point of view of Carol and her vivid hallucinations and nightmares as she comes into contact with men and their desires for her. Ian Hendry, John Fraser, Patrick Wymark, and Yvonne Furneaux appear in supporting roles.

Shot in London, it is Polanski's first English-language film and second feature-length production, following Knife in the Water (1962).

The film debuted at the 1965 Cannes Film Festival before receiving theatrical releases internationally. Upon its release, Repulsion received considerable critical acclaim and currently is considered one of Polanski's greatest works. The film was nominated for a BAFTA Award for Gilbert Taylor's cinematography.