J. Carrol Naish as Dr. Duryea alias Frankenstein

Lon Chaney Jr. as Groton

Zandor Vorkov as Count Dracula

Anthony Eisley as Mike Howard

Regina Carrol as Judith

Russ Tamblyn as Rico

Jim Davis as Sgt. Martin

John Bloom as The Monster

Shelly Weiss as The Creature

Greydon Clark as Strange

Angelo Rossitto as Grazbo the Evil Dwarf

Anne Morrell as Samantha

William Bonner as Biker

Forrest J. Ackerman as Dr. Beaumont

Maria Lease as Joan

Bruce Kimball as Biker (uncredited)

Albert Cole as Cop Killed by Creature (uncredited)

Gary Kent as Bob, Beach Boy (uncredited)

Connie Nelson as Laura, Beach Girl (uncredited)

Irv Saunders as Policeman (uncredited)

Lu Dorn as Hippie Girl (uncredited)