Killer Party is a 1986 Canadian supernatural slasher film directed by William Fruet, and starring Martin Hewitt, Ralph Seymour, Elaine Wilkes, Joanna Johnson, Sherry Willis-Burch, and Paul Bartel. It follows a trio of female sorority pledges who unleash a demonic force after participating in an initiation ritual in an abandoned house on their university's campus.

Released in May 1986, it was the last film in the original library of Metro-Goldwyn-Mayer (MGM) titles dating back to 1924, following the studio's sale from Kirk Kerkorian to Ted Turner the same month. While it received little critical notice at the time of its release, the film has gone on to accrue a cult following.