Monstroid
- År: 1980
- Land: United States of America
- Genre: Skräck, Science Fiction
- Studio: Academy International
- Nyckelord: monster, based on true story, water pollution, lake monster
- Direktör: Kenneth Hartford, Herbert L. Strock
- Kasta: James Mitchum, John Carradine, Philip Carey, Anthony Eisley, Andrea Hartford, Glen Hartford