What is the name of mental hospital in Halloween movie?

There is no mental hospital in the original "Halloween" movie (1978). The film does feature a psychiatric hospital called Smith's Grove, but Michael Myers escapes from a sanitarium, not a mental hospital.

This confusion likely stems from the sequel, "Halloween II" (1981), which features a mental hospital called Haddonfield Memorial Hospital, where Laurie Strode is admitted after her encounter with Michael Myers.