Dr. Loomis: I met him, fifteen years ago. I was told there was nothing left. No reason, no conscience, no understanding; even the most rudimentary sense of life or death, good or evil, right or wrong. I met this six-year-old child, with this blind, pale, emotionless face and, the blackest eyes... the DEVIL'S eyes! I spent eight years trying to reach him, and then another seven trying to keep him locked up for I realized what was living behind that boy's eyes was purely and simply... EVIL!
[After Michael falls off the balcony] Laurie: Was that the bogeyman? Dr. Loomis: As a matter of fact... it was!
Laurie: I saw Mr. Riddle in his backyard, he was watching me. Annie: Mr. Riddle was watching you? Laurie! Mr. Riddle is eighty-seven! Laurie: He can still watch. Annie: That's probably all he can do.
Laurie: Lynda, if this is a joke, I'll kill you!
Nurse Chambers: Don't you think it would be better if you referred to "it" as "him"? Dr. Loomis: If you say so. Nurse Chambers: Your compassion's overwhelming, doctor.
According to screenwriter / producer Debra Hill, the character of Laurie Strode was named after John Carpenter's first girlfriend.
The character of Michael Myers was named after the European distributor of Carpenter's previous film, Assault on Precinct 13 as a kind of weird "thank you" for the film's overseas success.
half of the $300,000 budget was spent on the Panavision cameras so the film would have a 2:35:1 scope.
Director John Carpenter was raised in Bowling Green, Kentucky. In one scene, the subtitle on the screen depicts the location as "Smiths Grove, Illinois." Smiths Grove, Kentucky, is a small town of about 600 people 15 miles from Bowling Green. There are many other references to other local towns and landmarks.