Demonstone
- Taon: 1990
- Bansa: Australia, Philippines, United States of America
- Genre: Horror, Thriller, Action, Crime, Fantasy
- Studio: International Film Entertainment, Fries Entertainment
- Keyword: investigation, u.s. marine, female journalist, army officer, supernatural killer, possessed killer
- Direktor: Andrew Prowse
- Cast: R. Lee Ermey, Jan-Michael Vincent, Nancy Everhard, Peter Brown, Pat Skipper, Joonee Gamboa