| Richard Dreyfuss | Roy Neary |
| François Truffaut | Claude Lacombe |
| Teri Garr | Ronnie Neary |
| Melinda Dillon | Jillian Guiler |
| Cary Guffey | Barry Guiler |
| Bob Balaban | David Laughlin |
| J. Patrick McNamara | Project leader |
| Warren Kemmerling | Wild Bill |
| Roberts Blossom | Farmer |
| Philip Dodds | Jean Claude |
| Shawn Bishop | Brad Neary |
| Adrienne Campbell | Silvia Neary |
| Justin Dreyfuss | Toby Neary |
| Merrill Connally | Team Leader |
| George DiCenzo | Major Benchley |
| Basil Hoffman | Actor |
| Lance Henriksen | Robert |
| Amy Douglass | Implantee |
| Alexander Lockwood | Implantee |
| Gene Dynarski | Ike |
| Norman Bartold | Ohio Tolls |
| Carl Weathers | M.P. |
| F.J. O'Neil | ARP Project Member |
| Randy Herman | Returnee #1 Flt. 19 |
| Hal Barwood | Returnee #2 Flt. 19 |
| Matthew Robbins | Returnee #3 Flt. 19 |
| David Anderson | Air Traffic Controller |
| Bill Thurman | Air Traffic |
| Gene Rader | Hawker |
| Eumenio Blanco | Federale |
| Chuy Franco | Federale |
| Luis Contreras | Federale |
| James Keane | Radio Telescope Team |
| Dennis McMullen | Radio Telescope Team |
| Matt Emery | Special Leader |
| Galen Thompson | Special Forces |
| John Dennis Johnston | Special Forces |
| Jon Ewing | Dirty Tricks #1 |
| Keith Atkinson | Dirty Tricks #2 |
| Robert Broyles | Dirty Tricks #3 |
| Josef Sommer | Larry Butler |
| David Gilbert | Voice Only |
| Bob Westmoreland | Actor |
Technical Credits
| Steven Spielberg | Director,Screenwriter |
| Phillip Abramson | Set Decoration/Design |
| John A. Alonzo | Cinematographer |
| Joe Alves | Production Designer |
| Roy Arbogast | Special Effects |
| Jerry Belson | Screenwriter |
| Jim Bloom | Producer |
| William A. Fraker | Cinematographer |
| Robert Glass | Sound/Sound Designer |
| Don Jarel | Cinematographer |
| Gregory Jein | Special Effects |
| Michael Kahn | Editor |
| Buzz Knudson | Sound/Sound Designer |
| Laszlo Kovacs | Cinematographer |
| Jim Linn | Costumes/Costume Designer |
| John Loggia | Production Designer |
| Daniel Lomino | Art Director |
| Don MacDougall | Sound/Sound Designer |
| Dennis Muren | Cinematographer |
| Chuck Myers | Asst. Director |
| Julia Phillips | Producer |
| Michael Phillips | Producer |
| Steven Poster | Camera Operator |
| Douglas Slocombe | Special Effects |
| Dave Stewart | Cinematographer |
| Douglas Trumbull | Cinematographer,Special Effects |
| John Williams [composer] | Score Composer |
| Matthew Yuricich | Special Effects |
| Richard Yuricich | Cinematographer,Special Effects |
| Vilmos Zsigmond | Cinematographer |
