| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alberto De Rossi | Crew | Costume & Make-Up | Makeup Supervisor |
 Bernardo Bertolucci | Crew | Writing | Story |
Bino Cicogna | Crew | Production | Executive Producer |
 Carlo Simi | Crew | Art | Production Design, Costume Designer |
 Claudio Mancini | Crew | Production | Production Manager |
 Dario Argento | Crew | Writing | Story |
Elio Pacella | Crew | Sound | Sound Engineer |
 Ennio Morricone | Crew | Sound | Original Music Composer, Conductor |
Eros Bacciucchi | Crew | Crew | Special Effects |
 Fulvio Morsella | Crew | Production | Producer |
 Giancarlo Santi | Crew | Directing | First Assistant Director |
 Giannetto De Rossi | Crew | Costume & Make-Up | Makeup Artist |
Grazia De Rossi | Crew | Costume & Make-Up | Hairdresser |
Italo Cameracanna | Crew | Sound | Sound Effects |
 John Landis | Crew | Crew | Stunts |
 Mickey Knox | Crew | Writing | Dialogue |
 Nino Baragli | Crew | Editing | Editor |
 Sergio Donati | Crew | Writing | Screenplay |
 Sergio Leone | Crew | Directing | Director, Story, Screenplay |
 Tonino Delli Colli | Crew | Camera | Director of Photography |
Ugo Tucci | Crew | Production | Production Supervisor |
Luciano Anzellotti | Crew | Sound | Sound Effects |
Claudio Maielli | Crew | Sound | Sound Engineer |
Fausto Ancillai | Crew | Sound | Sound Engineer |
Roberto Arcangeli | Crew | Sound | Sound Effects |
 Al Mulock | Cast | Actor | Frank's Gunman (uncredited) |
 Aldo Berti | Cast | Frank's Gunman (uncredited) | |
 Aldo Sambrell | Cast | Actor | Cheyenne's Gunman (uncredited) |
 Antonio Molino Rojo | Cast | Actor | Frank's Gunman (uncredited) |
 Charles Bronson | Cast | Actor | 'Harmonica' |
 Claudia Cardinale | Cast | Actress | Jill |
Claudio Mancini | Cast | Actor | Hanged Man (uncredited) |
 Conrado San Martín | Cast | Actor | McBain's Neighbor (uncredited) |
 Dino Mele | Cast | Actor | Harmonica as a Boy (uncredited) |
 Enzo Santaniello | Cast | Actor | Timmy McBain (uncredited) |
 Fabio Testi | Cast | Actor | Frank's Gunman (uncredited) |
 Frank Braña | Cast | Actor | Frank's Gunman (uncredited) |
 Frank Wolff | Cast | Actor | Brett McBain |
 Gabriele Ferzetti | Cast | Actor | Morton |
 Henry Fonda | Cast | Actor | Frank |
 Jack Elam | Cast | Actor | Frank's Gunman |
 Jason Robards | Cast | Actor | 'Cheyenne' |
 John Frederick | Cast | Actor | Jim (uncredited) |
 Keenan Wynn | Cast | Actor | Sheriff |
 Lionel Stander | Cast | Actor | Innkeeper |
 Marco Zuanelli | Cast | Actor | 'Wobbles' (uncredited) |
 Paolo Stoppa | Cast | Actor | Sam |
 Renato Pinciroli | Cast | Actor | Bidder (uncredited) |
 Román Ariznavarreta | Cast | Actor | Logan (uncredited) |
 Saturno Cerra | Cast | Actor | Frank's Gunman (uncredited) |
 Simonetta Stefanelli | Cast | Actress | Maureen McBain (uncredited) |
 Spartaco Conversi | Cast | Actor | Frank's Gunman (uncredited) |
 Woody Strode | Cast | Actor | Frank's Gunman |
 Paolo Figlia | Cast | Actor | Frank's Gunman (uncredited) |
Simonetta Santaniello | Cast | Maureen McBain (uncredited) | |
 Antonio Palombi | Cast | Actor | Station Agent (uncredited) |
Stefano Imparato | Cast | Patrick McBain (uncredited) | |
Luana Strode | Cast | Actress | Cattle Corner Woman (uncredited) |
| Person | Type | Job | Role(s) |
