In the 1978 original Halloween, what is the name of the institution Michael Myers escapes from?

In the 1978 original Halloween, Michael Myers escapes from Smith’s Grove Sanitarium.

The film opens with Michael escaping from the institution on October 30, 1978, after being held there for fifteen years. He returns to his hometown of Haddonfield, Illinois, where he begins stalking Laurie Strode and other residents on Halloween night.

Dr. Samuel Loomis, played by Donald Pleasence, has treated Michael for years and considers him exceptionally dangerous. Loomis’s warning about Michael is a major reason the institution’s name and role matter to the opening setup, even though most of the film takes place in Haddonfield.

Smith’s Grove is sometimes shortened in discussion to Smith’s Grove Sanitarium or Smith’s Grove Warren County Sanitarium. It should not be confused with Haddonfield Memorial Hospital, which appears in later parts of the franchise and is a separate location.