Jason Voorhees is a character from the Friday the 13th series. He first appeared in Friday the 13th (1980) as the young son of camp-cook-turned-killer Mrs. Voorhees, in which he was portrayed by Ari Lehman. Created by Victor Miller, with contributions by Ron Kurz, Sean S. Cunningham and Tom Savini, Jason was not originally intended to carry the series as the main antagonist. The character has subsequently been represented in various other media, including novels, video games, comic books, and a crossover film with another iconic horror film character, Freddy Krueger.

Friday the 13th is an American horror franchise that comprises twelve slasher films, a television series, novels, comic books, video games, and tie‑in merchandise. The franchise mainly focuses on the fictional character Jason Voorhees, who was thought to have drowned as a boy at Camp Crystal Lake due to the negligence of the camp staff. Decades later, the lake is rumored to be "cursed" and is the setting for a series of mass murders. Jason is featured in all of the films, as either the killer or the motivation for the killings. The original film, created to cash in on the success of Halloween (1978), was written by Victor Miller and was produced and directed by Sean S. Cunningham. The films have grossed over $468 million at the box-office worldwide.