Halloween H20: 20 Years Later also known as Halloween: H20 is the seventh film in the Halloween film series. Initially released in the United States on Wednesday, August 5, 1998, it was released in several European countries as well as Singapore, Israel, Australia, and Mexico in the months that followed.

This is the first film about the Michael Myers character to not feature Donald Pleasence. Pleasence had died shortly before the release of Halloween: The Curse of Michael Myers thus off-setting one of the key components of the series. This chapter is meant to be a direct sequel to Halloween II or, as people may call it, a remake of Halloween III. The "H20" in the title refers to the film taking place in continuity (as well as the sequel and having been made) twenty years after the original. This is evident in the "20 Years Later" subtitle, not to water as some may think. Identifying films with abbreviations in marketing has been common since Terminator 2: Judgement Day (T2) in 1991.