Trivia: The assault takes place on Precinct 9, Division 13. There is no "Precinct 13" in the film. At first John Carpenter wanted to call the film "The Anderson Alamo" (the original title of his screenplay), and at one point he changed the working title to "The Siege." CKK, the film's distributor, was responsible for the misnomer; it rejected Carpenter's titles and came up with the name "Assault on Precinct 13" (which it felt was more ominous sounding) during post-production.THGhost
Trivia: The train crash at the end of the movie was filmed at Toronto's Union Station. While the layout of Union Station is irrelevant, it's interesting that the train's final position would have required it to cross the tracks at a 90° angle (more or less) and drop down onto the ramp that connects the Great Hall to the passenger departure area.