 | Arnold Schwarzenegger als Conan |
 | James Earl Jones als Thulsa Doom |
 | Max von Sydow als King Osric |
 | Sandahl Bergman als Valeria |
 | Ben Davidson als Rexor |
 | Cassandra Gava als The Witch |
 | Gerry Lopez als Subotai |
 | Mako als The Wizard / Narrator |
 | Valérie Quennessen als The Princess |
 | William Smith als Conan's Father |
 | Luis Barboo als Red Hair |
 | Franco Columbu als Pictish Scout |
 | Leslie Foldvary als Sacrificial Snake Girl |
 | Gary Herman als Osric's Guard |
 | Erik Holmey als Turanian War Officer |
| Akio Mitamura als Mongol General |
 | Nadiuska als Conan's Mother |
 | Jorge Sanz als Young Conan |
 | Jack Taylor als Priest |
 | Sven-Ole Thorsen als Thorgrim |
| Kiyoshi Yamasaki als Sword Master |
 | Pilar Alcón als Orgy Slave Girl (uncredited) |
| Florencio Amarilla als Man (uncredited) |
 | Ron Cobb als Black Lotus Street Peddler (uncredited) |
 | Fabián Conde als Merchant at Tavern (uncredited) |
 | Dragon Dronet als Pit Fighter (uncredited) |
 | Donald Gibb als Osric's Guard (uncredited) |
 | Andrea Guzon als Breeding Woman (uncredited) |
| Corrie Jansen als Beautiful Woman Jumping to her Death (uncredited) |
 | Olvido Lorente als Guerrera (uncredited) |
 | Isabel Luque als Woman (uncredited) |
 | Celia Milius als High Priestess |
 | John Milius als Foodseller in Old City (uncredited) |
 | Sab Shimono als Subotai (voice, uncredited) |
| John Milius | Director |
| Duke Callaghan | Director of Photography |
| Edward R. Pressman | Executive Producer |
| Basil Poledouris | Original Music Composer |
| D. Constantine Conte | Executive Producer |
| John Milius | Screenplay |
| Raffaella De Laurentiis | Producer |
| Dino De Laurentiis | Executive Producer |
| Carroll Timothy O'Meara | Editor |
| Oliver Stone | Screenplay |
| Buzz Feitshans | Producer |
| Ron Cobb | Production Design |
| Edward Summer | Story |
| Edward Summer | Associate Producer |
| Michele Sharp | Sound Editor |
| Carlos Ponce de León | Transportation Captain |
| Miguel Ángel Alonso | Production Office Assistant |
| Anne Strick | Unit Publicist |
| Colin Arthur | Makeup Effects |
| Peter Voysey | Sculptor |
| Santiago DeBenito | Production Accountant |
| Pamela Peitzman | Makeup Artist |
| Tomas Lorenzo | Propmaker |
| Paquita Núñez | Hair Department Head |
| Terry Leonard | Stunt Coordinator |
| Pier Luigi Basile | Art Direction |
| Christopher Holmes | Additional Editing |
| Veljko Despotović | Art Direction |
| Bub Asman | Sound Effects Editor |
| Ricardo Navarrete | Camera Operator |
| Michael B. Gladych | Researcher |
| William Stout | Production Artist |
| Benjamín Fernández | Art Direction |
| Adolfo Cofiño | Construction Coordinator |
| José Luis Ayestarán | Stunts |
| Robert Randles | Music Editor |
| Barbara Back | Production Office Coordinator |
| Fred J. Brown | Supervising Sound Editor |
| Micky Wilson | Gaffer |
| Vicente Escrivá hijo | Production Manager |
| Wayne Artman | Sound Re-Recording Mixer |
| Conrad M. Gonzalez | Supervising Film Editor |
| Jim Willis | Sound mixer |
| Richard Ritchie | Color Timer |
| Greig McRitchie | Orchestrator |
| Yvonne Axeworthy | Script Supervisor |
| Giorgio Postiglione | Set Decoration |
| John Bloomfield | Costume Design |
| Emilio Marquerie | Transportation Coordinator |
| José Antonio Sánchez | Hairstylist |
| Pepe Escriva | Unit Production Manager |
| Katherine Kean | Animation |
| Manuel Paredes Murillo | Driver |
| Juan Clemente Prosper | Location Manager |
| Roberto Cirla | Assistant Director |
| Nick Allder | Special Effects Supervisor |
| Bob Penn | Still Photographer |
| María Eugenia Escrivá | Assistant Costume Designer |
| Francesca DeLaurentiis | Continuity |
| Donah Bassett | Negative Cutter |
| Shelley Brown | Apprentice Sound Editor |
| Franco Antonelli | Wardrobe Supervisor |
| Humberto Gurza | Animal Wrangler |
| José Antonio Sánchez | Makeup Supervisor |
| Basil Poledouris | Conductor |
| Antonio Fernández Santamaría | Key Grip |
| José López Rodero | First Assistant Director |
| Juno J. Ellis | Assistant Sound Editor |
| Víctor Albarrán | Second Assistant Director |
| Carlo De Marchis | Special Effects Supervisor |
| Carlo De Marchis | Effects Supervisor |
| Emilio Ruiz del Río | Special Effects |
| Robert E. Howard | Characters |
| Dino De Laurentiis | Presenter |
| Julián Mateos | Property Buyer |
| Margarita McDermott | Production Secretary |
| José Luis Aguilar | Assistant Camera |
| Martín Díaz | Wardrobe Master |
| Carl Graham | Location Coordinator |
| L. Sprague De Camp | Technical Advisor |
| Antonio Balandín | Special Effects Technician |
| Margie O'Malley | Foley Artist |
| Stephen Jackson | Wardrobe Assistant |
| Graham Sumner | Property Master |
| Caryl Wickman | Dialogue Editor |
| Terry Leonard | Second Unit Director |
| Bob Terhune | Stunts |
| Walter Scott | Stunts |
| John-Clay Scott | Stunts |
| Ben Scott | Stunts |
| Larry Randles | Stunts |
| Juan Maján | Stunt Coordinator |
| Corrie Jansen | Stunts |
| Ángel Gómez Fernández | Stunts |
| Ricardo Cruz | Stunts |
| José Luis Chinchilla | Stunts |
| Jim Burk | Stunts |
| Tony Brubaker | Stunts |
| Bettina Brenner | Stunts |
| Dino De Laurentiis | Producer |
| Francisco Ardura | Animal Wrangler |
| Steven Scott Smalley | Orchestrator |
