Continuity: In the scene when Michael is carrying Annie's body into the house her head is on the left side of his body. After they show the boy looking out the window they cut back to Michael and suddenly Annie's head is on the right side of his body.

Factual error: Even though the story is set in Haddonfield IL, all of the cars have California license plates.

Continuity: In the closing credits, Michael Myers is said to be 23 years of age, he was actually 21.

Revealing: There is a scene where Michael Myers is hiding behind a hedge bush and Laurie and her friend go to investigate. Laurie turns around and talks and you see cigarette smoke go by the camera. It came from one of the camera crew members shooting the scene.