| Frost | 2004 | | Movie |
| Skinned Deep | 2004 | Forrey | Movie |
| SadoMannequin | 2001 | Dr. Acula | Short Film |
| The Creep | 2001 | The Host | Movie |
| Professor Griffin's Midnight Shadow Show | 2001 | Professor Bruno Lampini (voice) | TV Show |
| Tales from the Ackermansion | 1999 | Horror Host | Movie |
| Dinosaur Valley Girls | 1996 | Acker-Man on the street | Movie |
| Frankenstein and Me | 1996 | Priest at Les Williams funeral (uncredited) | Movie |
| Attack of the 60 Foot Centerfolds | 1995 | Dracula | Movie |
| Bikini Drive-In | 1995 | Man With Insect Repellent | Movie |
| Beverly Hills Cop III | 1994 | Bar Patron (uncredited) | Movie |
| Ceremony | 1994 | Sylvia's father | Movie |
| That Little Monster | 1994 | Edward Van Groan | Movie |
| Braindead | 1992 | Forry | Movie |
| Innocent Blood | 1992 | Stolen Car Man | Movie |
| Nudist Colony of the Dead | 1991 | Judge Rhinehole (as Forrest J Ackerman) | Movie |
| Hard to Die | 1990 | Dr. Newton | Movie |
| Metamorphosis | 1990 | Private Eye (uncredited) | Movie |
| My Lovely Monster | 1990 | The Master | Movie |
| The Alien Within | 1990 | Pool Guy with other dialogue as in 'Evil Spawn' | Movie |
| My Mom's a Werewolf | 1989 | Boris Faroff (uncredited) | Movie |
| The Laughing Dead | 1989 | Corpse #1 | Movie |
| Transylvania Twist | 1989 | Funeral Director | Movie |
| Curse of the Queerwolf | 1988 | Mr. Richardson | Movie |
| Return of the Living Dead Part II | 1988 | Special Zombie (as Forrest Ackerman) | Movie |
| The Wizard of Speed and Time | 1988 | Mustached Man at Garage Sale (as Forrest Ackerman) | Movie |
| Vampire at Midnight | 1988 | Director of Supernatural Society (uncredited) | Movie |
| Amazon Women on the Moon | 1987 | U.S. President (segment "Amazon Women on the Moon") | Movie |
| Evil Spawn | 1987 | Pool Guy | Movie |
| Into the Night | 1985 | Man in Coffee Shop (uncredited) | Movie |
| Scalps | 1983 | Professor Trentwood | Movie |
| Michael Jackson: Thriller | 1983 | Man in Movie Theater (uncredited) | Music Video |
| The Aftermath | 1982 | The Curator | Movie |
| The Howling | 1981 | Bookstore Customer (uncredited) | Movie |
| Starstruck | 1979 | Alien Astronaut (uncredited) | TV Movie |
| The Kentucky Fried Movie | 1977 | Juror (segment "Courtroom") | Movie |
| Hollywood Boulevard | 1976 | Party Guest (uncredited) | Movie |
| King Kong | 1976 | Fleeing Extra in Crowd (uncredited) | Movie |
| The Return of the Frankenstein Monster | 1976 | Frankenstein Monster | Short Film |
| The Milpitas Monster | 1975 | Officer (uncredited) | Movie |
| Schlock | 1973 | Man in cinema (uncredited) | Movie |
| The Conquest of Mars | 1972 | | Short Film |
| Dracula vs. Frankenstein | 1971 | Dr. Beaumont (as Forest J Ackerman) | Movie |
| Equinox | 1970 | Doctor on Tape Recorder (voice, uncredited) | Movie |
| The Power | 1968 | Delegate A.C. Fogbottom (uncredited) | Movie |
| Queen of Blood | 1966 | Farraday's Aide (as Forrest Ackerman) | Movie |
| The Time Travelers | 1964 | Square-frame technician | Movie |
| I Was a Teenage Mummy | 1962 | Narrator (1995 Video Release) | Movie |
| Chicon 62 | 1962 | | Short Film |
| It Came from Alpha Centauri | 1962 | | Short Film |
| Tyran the Terrible | 1962 | | Short Film |
| The Genie | 1957 | Man with Magic Lamp | Short Film |
| The Winner's Circle | 1948 | Man in Crowd (uncredited) | Movie |
| The Farmer's Daughter | 1947 | Audience Member at Finley Rally (uncredited) | Movie |
| The Homestretch | 1947 | Forrest J. Ackerman (uncredited) | Movie |
| Hey, Rookie | 1944 | Sgt. Ack-Ack (uncredited) | Movie |
