Other: Although the Lieutenant is actually sent to the police station in precinct 9, division 13, the sign over the door states it to be division 14.

Continuity: In the scene where Napolean has saved the girl's life in the cell blocks, they go back into the main part of the police station and Napolean holds the door to the cells closed. The first time you see him holding the door closed there are bullet holes above his head but there has been no gunfire and he does not act as if the people behind the door are shooting at him. It's not until the film cuts back to him a second time (or possibly the third) that there is gunfire on the sound track, the bullet holes are focused on and his character ducks down whilst complaining that he can't hold the door for much longer.

Factual error: Why is this film called "Assault on Precinct 13" when the station the Lieutenant is sent to is referred to as Precinct NINE, Division THIRTEEN - shouldn't the film be called "Assault on Precinct 9'?

Factual error: In the scene where Julie, the secretary, has been discovered dead; the lieutenant approaches her, kneels down, and checks for a pulse with his thumb. As anyone with any medical knowledge should know, if you attempt to take someone's pulse with your thumb, you will get your own pulse and not the victim's.