Roy Scheider (Brody), Robert Shaw (Quint), Richard Dreyfuss (Hooper), Lorraine Gary (Ellen Brody), Murray Hamilton (Vaughn), Carl Gottlieb (Meadows), Jeffrey Kramer (Hendricks) more..., Susan Backlinie (Chrissie), Jonathan Filley (Cassidy), Ted Grossman (Estuary Victim), Chris Rebello (Michael Brody), Jay Mello (Sean Brody), Lee Fierro (Mrs. Kintner), Jeffrey Voorhees (Alex Kintner), Craig Kingsbury (Ben Gardner), Phil Murray (Mr. Taft), Robert Nevin (Medical Examiner), Peter Benchley (Interviewer), Fritzi Jane Courtney (Mrs. Taft (uncredited)), David Engelbach (Research Assistant (uncredited)), Dorothy Fielding (Girl in Music Store (uncredited)), Joe La Creta (Barwood (uncredited)), Belle McDonald (Mrs. Posner (uncredited)), Joseph Oliveira (Swimmer (uncredited)), Beverly Powers (Topless Swimmer (uncredited)), Ayn Ruymen (Nurse (uncredited)), Christopher Sands (Lifeguard (uncredited)), Steven Spielberg (Amity Point Lifestation Worker (voice) (uncredited)), Rex Trailer (Scout Master (uncredited)), Chris Anastasio (Out of Towner (uncredited)), Henry Carreiro (Felix (uncredited)), Robert Carroll (Mr. Polk (uncredited)), Edward Chalmers Jr. (Mr. Denherder (uncredited)), David Daniel (Hippie on Beach (uncredited)), Cyprian R. Dube (Mr. Posner (uncredited)), Wally Hooper Jr. (Harry (uncredited)), Duncan Inches (Townsperson (uncredited)), John Moffet (At Bonfire with Mustache (uncredited)), John Searle (Converted Man (uncredited)), Hershel West (Salvatore (uncredited)) and others.

Peter Benchley (Novel), Carl Gottlieb (Screenplay), David Brown (Producer), Richard D. Zanuck (Producer), John Williams (Original Music Composer), Verna Fields (Editor), Joe Alves (Production Design) more..., John M. Dwyer (Set Decoration), Thomas J. Wright (Art Department Coordinator), Robert A. Mattey (Special Effects), Peter Benchley (Screenplay), Bill Butler (Director of Photography), Shari Rhodes (Casting), Del Armstrong (Makeup Artist), Verne Caruso (Hairstylist), Jim Gillespie (Makeup Artist), James Fargo (Unit Production Manager), Thomas J. Wright (Production Illustrator), William C. Carruth (Assistant Editor), Jeff Gourson (Assistant Editor), Charlsie Bryant (Script Supervisor), Robert L. Hoyt (Sound), John R. Carter (Sound), Dick Ziker (Stunt Double), Werner Keppler (Sculptor), Michael Chapman (Camera Operator), William S. Gilmore (Production Executive), Fred Zendar (Technical Advisor), Ron Taylor (Camera Operator), Tom Joyner (First Assistant Director), Valerie Taylor (Camera Operator), Barbara Bass (Second Assistant Director), Leonard J.V. Compagno (Thanks), Shari Rhodes (Location Casting), Lynn Murphy (Production Assistant), Ted Grossman (Stunt Coordinator), Richard E. Butler (Stunts), Dick Warlock (Stunt Double), Denise Cheshire (Stunts), Fred Zendar (Stunts) and others.