Night of the Demon is a 1980 American horror film directed by James C. Wasson, written by Jim L. Ball and Mike Williams, and starring Michael Cutt, Joy Allen, Robert Collings, Jodi Lazarus, Richard Fields, Michael Lang, and Melanie Graham. The film centers on an anthropologist who, along with a group of his pupils, embarks on an expedition to prove the existence of Bigfoot in a rural region of Northern California, only to be stalked and systematically slaughtered by the creature.

Completed in 1979, the film was first released on VHS in the United States in 1983. Due to its graphic violence, the film was deemed a "video nasty" by the British Board of Film Classification, and underwent heavy censorship in the United Kingdom. It later received a DVD release from Code Red in 2011, sourced from a tape master. In November 2021, Severin Films issued the film for the first time on Blu-ray, featuring a 2K scan from the original film elements, which were previously alleged to be lost.