Creator Backlash: People involved in the making of this and other movies in the series have sometimes expressed their dislike for the dream sequence ending featuring the corpse of Mrs. Voorheese attacking Chris, due to the obvious fridge logic that Chris never met the woman and would have no idea who that is.
Recycled Set: The set was later reused for In the Light of the Moon, a movie about Ed Gein.
The original script had Jason wearing an umpire's mask.
This was at one time planned to be the last in the franchise. To celebrate the conclusion of filming the movie and the supposed end of the series, the cast and crew threw a party and signed Rest in Peace messages to Jason's memory.
In an alternate ending, Ali survives; Chris opens the door to find Jason, but is scared by Ali. They both get away. Soon after, the paramedics arrive, only to never find Jason's body.