Clownhouse is a 1989 American slasher film written and directed by Victor Salva in his feature-length directorial debut. It stars Nathan Forrest Winters, Brian McHugh, and Sam Rockwell as three young brothers stalked by escaped mental patients disguised as clowns, portrayed by Michael Jerome West, Bryan Weible, and David C. Reinecker. Clownhouse marks the second collaboration for Salva with Winters and McHugh, who previously appeared in his short film Something in the Basement (1986), and Rockwell's first film appearance.

The film premiered at the 1989 Sundance Film Festival, where it was nominated for the Grand Jury Prize in the dramatic category. The rights to Clownhouse were picked up by Vision International and Triumph Releasing Corporation, who released the film to theaters on July 20, 1990. Home media releases would be distributed by Metro-Goldwyn-Mayer in the early 2000s.

Clownhouse became the subject of controversy when Salva was convicted during post-production for sexually abusing the 12-year-old Winters between shoots. Due to the controversy, home media releases of the film were removed from distribution and are out of print.