- Ellen Burstyn
- Chris MacNeil
- Linda Blair
- Regan Teresa MacNeil
- Max von Sydow
- Father Lankester Merrin
- Lee J. Cobb
- Lieutenant William Kinderman
- Kitty Winn
- Sharon Spencer
- Jack MacGowran
- Burke Dennings
- Jason Miller
- Father Damien Karras
- Reverend William O'Malley
- Father Dyer
- Barton Heyman
- Dr. Klein
- Peter Masterson
- Dr. Barringer, Clinic Director
- Rudolf Schündler
- Karl
- Gina Petrushka
- Willi
- Robert Symonds
- Dr. Taney
- Arthur Storch
- Psychiatrist
- Reverend Thomas Bermingham
- Tom, President of University
- Vasiliki Maliaros
- Karras' Mother
- Titos Vandis
- Karras' Uncle
- Wallace Rooney
- Bishop Michael
- Ron Faber
- Chuck, Assistant Director/Demonic Voice
- Donna Mitchell
- Mary Jo Perrin
- Roy Cooper
- Jesuit Dean
- Robert Gerringer
- Senator at Party
- Mercedes McCambridge
- Pazuzu
- William Friedkin
- Director
- Noel Marshall
- Executive Producer
- William Peter Blatty
- Producer, Screenwriter
- Jack Nitzsche
- Original Music
- Owen Roizman
- Cinematographer
- Billy Williams
- Cinematographer
- Norman Gay
- Film Editing
- Evan A. Lottman
- Film Editing
- Bud S. Smith
- Film Editing
- Louis DiGiaimo
- Casting
- Nessa Hyams
- Casting
- Juliet Taylor
- Casting
- Bill Malley
- Production Design
- Terence A. Donnelly
- First Assistant Director
- Jerry Wunderlich
- Set Decoration
- John Robert Lloyd
- Art Director
- Joseph Fretwell III
- Costume Design
