Circus of Horrors is a 1960 British horror film directed by Sidney Hayers, and starring Anton Diffring, Yvonne Monlaur, Erika Remberg, Kenneth Griffith, Jane Hylton, Conrad Phillips, Yvonne Romain, and Donald Pleasence. Set in 1947, it follows a deranged plastic surgeon who changes his identity after botching an operation, and later comes to gain control of a circus that he uses as a front for his surgical exploits. The original screenplay was written by American screenwriter George Baxt.

It was released in the United States by American International Pictures as a double feature with The Angry Red Planet (1959).