Trivia: When the oldest boy is hit in the face with a basketball, he blurts out "Oh, f***!"
Trivia: Director Martin Scorsese makes more then just a cameo in this film, he's the passenger that sits with Travis talking about how he's going to kill his wife for cheating on him with a black man. He's credited as "Man Watching Silhouette".
Trivia: Frank Wills, the security guard who discovered the Watergate break-in, plays himself.
Trivia: The film-makers only had three vintage US aircraft for the production, namely two F4F Wildcat fighters and a PBY Catalina search plane. All of the other aircraft that appear are from either wartime footage or from previous war movies.
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.
Trivia: Beatrice Straight won the Best Supporting Actress Academy Award for her role of Louise Schumacher, even though she was only on screen for five minutes and forty seconds. This is the shortest performance ever to win an Oscar.
Trivia: The smile that Damien gives at the very end wasn't scripted. Originally, Damien was supposed to "look really mean," but Harvey Stephens couldn't keep a straight face: he started to smile, then laugh. Richard Donner decided that the smile made Damien look even more evil, so it stayed in the movie.
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.
Trivia: The film was a box-office failure and was withdrawn from some cinemas three days after opening. It only recovered the production cost after sales to television companies and international releases.
Trivia: After this movie was released, the character Engleberg had to be recast because the actor who played him lost a lot of weight and no longer could play the "fat" catcher so a new heavy actor replaced him in the next two sequels.