Class Reunion is a 1982 American black comedy film produced by National Lampoon as the third film from the magazine. It was the second film released; although National Lampoon Goes to the Movies was filmed in 1981, it was delayed and not released until 1982.

In the film, the 1972 graduating class of a high school is gathering for their class reunion. They are unaware that among the guests is an escaped mental patient, who wants revenge for a decade-old sadistic prank which had ruined his life and his sanity. After several deaths at the reunion, the surviving alumni team-up to discover who is their secret enemy.