 | J. Carrol Naish als Dr. Duryea alias Frankenstein |
 | Lon Chaney Jr. als Groton |
 | Zandor Vorkov als Count Dracula |
 | Anthony Eisley als Mike Howard |
 | Regina Carrol als Judith |
 | Russ Tamblyn als Rico |
 | Jim Davis als Sgt. Martin |
 | John Bloom als The Monster |
 | Shelly Weiss als The Creature |
 | Greydon Clark als Strange |
 | Angelo Rossitto als Grazbo the Evil Dwarf |
| Anne Morrell als Samantha |
| William Bonner als Biker |
 | Forrest J. Ackerman als Dr. Beaumont |
 | Maria Lease als Joan |
 | Bruce Kimball als Biker (uncredited) |
 | Albert Cole als Cop Killed by Creature (uncredited) |
 | Gary Kent als Bob, Beach Boy (uncredited) |
| Connie Nelson als Laura, Beach Girl (uncredited) |
| Irv Saunders als Policeman (uncredited) |
| Lu Dorn als Hippie Girl (uncredited) |
| William Pugsley | Screenplay |
| Samuel M. Sherman | Producer |
| Gary Graver | Director of Photography |
| Paul Glickman | Director of Photography |
| Al Adamson | Director |
| Irwin Cadden | Editor |
| Samuel M. Sherman | Screenplay |
| Al Adamson | Producer |
| Ray Markham | Art Direction |
| Tony Tierney | Makeup Effects |
| Mohammed Rustam | Associate Producer |
| William Lava | Original Music Composer |
| John Van Horne | Producer |
| Ken Strickfaden | Special Effects |
| Bob Le Bar | Visual Effects |
| Mardi Rustam | Executive Producer |
| John Winfield | Editor |
| Sheldon Lee | Makeup Artist |
| Gretchen Moon | Hairstylist |
| Tony Tierney | Special Effects Makeup Artist |
| George Barr | Special Effects Makeup Artist |
| Gary Kent | Assistant Director |
| Bob Dietz | Production Sound Mixer |
| Dale Skillicorn | Production Sound Mixer |
| Aaron Nathanson | Sound Engineer |
| Bob Le Bar | Title Designer |
| Al Adamson | Stunt Double |
| R. Michael Stringer | Assistant Camera |
| Gretchen Moon | Costumer |
