The Mysterious Monsters
- Tahun: 1976
- Negara: United States of America
- Genre: Documentary, Horror, Fantasy
- Studio: Sunn Classic Pictures
- Kata kunci: paranormal phenomena, hypnosis, bigfoot, yeti, loch, alien, conspiracy theory, ufo, psychic power
- Pengarah: Robert Guenette
- Pelakon: Peter Graves, Peter Hurkos, William Stenberg, Sidney Walter, Jerilou Whelchel, Roger Patterson