#19: The Jacket Amnesiac Gulf War veteran Jack Starks (Adrien Brody) can't explain why he's been found at the scene of a murder. Ordered to a mental hospital, Jack is subjected to Dr. Thomas Becker's unusual treatment plan, which involves mysterious injections, sensory deprivation and confinement in a straitjacket.
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#18: Grave Encounters 2 Film students break into an abandoned psychiatric institution to research a movie's paranormal claims but quickly discover ghosts are very real when they are tortured at the hands of their terrifying study subjects.
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#17: Unsane A young woman (Claire Foy) is involuntarily committed to a mental institution where she is confronted by her greatest fear - but is it real or a product of her delusion?
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#16: Fractured After his wife and injured daughter disappear from the emergency room, a man (Sam Worthington) becomes convinced the hospital is hiding something.
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#15: The Invisible Man After staging his own suicide, a crazed scientist (Oliver Jackson-Cohen) uses his power to become invisible to stalk and terrorize his ex-girlfriend (Elizabeth Moss). When the police refuse to believe her story, she decides to take matters into her own hands and fight back.
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#14: The Exorcist III A police lieutenant (George C. Scott) uncovers more than he bargained for as his investigation of a series of murders, which have all the hallmarks of the deceased Gemini serial killer, leads him to question the patients of a psychiatric ward.
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#13: The Entity Single mother Carla Moran (Barbara Hershey) is raped and attacked by an invisible force. She begins therapy with Dr. Phil Sneiderman (Ron Silver), a psychiatrist who believes Carla's traumatic past is motivating her to commit self-induced injuries, rather than anything supernatural.
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#12: Eli Eli (Charlie Shotwell) has a rare autoimmune disorder and is sent to a special experimental clinic for treatment. But he soon discovers the house he's staying in isn't as safe as he thought. Available on Netflix
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#11: Fragile A nurse (Calista Flockhart) at an old children's hospital struggles to protect her charges from a mysterious and evil force. The hospital is at the point of being abandoned when a train crash brings multiple victims to its doors. Amid the chaos, the nurse is drawn to a group of orphans who seem to be under the influence of a restless spirit that haunts the hospital.
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#10: The Ward Kristen (Amber Heard) is committed to a psychiatric unit where it seems an angry spirit of a former patient is haunting the girls who are being treated there. Kristen makes desperate escape attempts after the staff ignore her warnings about the spirit.
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#9: Hellbound: Hellraiser II Kirsty (Ashley Laurence) is brought to an institution after the horrible events of the first film, where the occult-obsessive head doctor resurrects Julia (Clare Higgins) and unleashes the Cenobites and their demonic underworld. Available on Amazon Prime and Shudder
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#8: Shutter Island Teddy Daniels (Leonardo DiCaprio) and Chuck Aule (Mark Ruffalo), two US marshals, are sent to a fortress-like insane asylum on a remote island in order to investigate the disappearance of a patient. As the investigation deepens, Teddy realizes something terrible is happening and he will have to confront his own dark fears if he hopes to make it off the island alive.
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#7: The Uninvited Anna (Emily Browning) returns home after a stint in a mental hospital, but her recovery is jeopardized when she discovers her mother’s former nurse (Elizabeth Banks) is her cruel new stepmother. When the ghost of Anna’s mother appears, screaming about her murder, Anna and her sister start to investigate.
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#6: A Nightmare on Elm Street 3: Dream Warriors A psychiatrist (Heather Langenkamp) familiar with knife-wielding dream demon Freddy Krueger helps teens at a mental hospital battle the killer who is invading their dreams.
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#5: Stonehearst Asylum An Oxford graduate (Jim Sturgess) takes up a job in a mental asylum, only to discover that the “revolutionary” new treatments are inhumane, and that there is more going on than meets the eye.
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#4: Gothika Psychiatrist Miranda Grey's (Halle Berry) life is derailed after she nearly hits a girl with her car one night. Later, Miranda wakes up in her own mental hospital under the care of her peer, Pete Graham (Robert Downey Jr.). Completely disoriented, Miranda is accused of killing her own husband, but she has no memory of anything after she encountered the girl.
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#3: Grave Encounters For their ghost hunting reality show, a production crew locks themselves inside an abandoned mental hospital that’s supposedly haunted – and it might prove to be all too true. Available on IMDb TV, Pluto, and Tubi
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#2: Session 9 For 15 years, the Danvers State Mental Hospital has been abandoned. The residents steer clear of the deteriorating building, but when a group of asbestos removal workers begin working there, the hospital's horrific past seems to be coming back.
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#1: Halloween II After failing to kill stubborn survivor Laurie (Jamie Lee Curtis) and taking a bullet or six from former psychiatrist Dr. Sam Loomis, Michael Myers has followed Laurie to the Haddonfield Memorial Hospital, where she’s been admitted for Myers’ attempt on her life. Myers slashes his way through hospital staff to reach his favorite victim.