| Person | Type | Job | Role(s) |
|---|---|---|---|
 Aldo Tonti | Crew | Camera | Director of Photography |
 Ann Roth | Crew | Costume & Make-Up | Costume Design |
 Dino Maiuri | Crew | Writing | Dialogue |
 Armando Trovajoli | Crew | Sound | Original Music Composer |
Boris Juraga | Crew | Art | Set Decoration |
 | Crew | Production | Producer |
Ferdinando Ruffo | Crew | Art | Set Decoration |
 Giannetto De Rossi | Crew | Costume & Make-Up | Makeup Artist |
Giorgio Desideri | Crew | Costume & Make-Up | Costume Design |
Johnny Dwyre | Crew | Editing | Editor |
 Mario Garbuglia | Crew | Art | Production Design |
 Massimo De Rita | Crew | Writing | Dialogue |
 Nino Crisman | Crew | Production | Executive Producer |
 Riz Ortolani | Crew | Sound | Original Music Composer |
 Stephen Geller | Crew | Writing | Screenplay |
 Terence Young | Crew | Directing | Director |
 Peter Maas | Crew | Writing | Novel |
Rocco Roy Mangano | Crew | Sound | Sound Engineer |
Monica Finzi | Crew | Editing | Editor |
Roger Duchet | Crew | Production | Producer |
Jerry Ferraro | Crew | Production | Co-Producer |
 Alessandro Sperli | Cast | Actor | Giuseppe 'Joe the Boss' Masseria |
 Amedeo Nazzari | Cast | Actor | Gaetano Reina |
 Angelo Boscariol | Cast | Actor | Gangster (uncredited) |
 Angelo Infanti | Cast | Actor | Lucky Luciano |
 Anthony Dawson | Cast | Actor | Federal Investigator |
 Arny Freeman | Cast | Actor | Warden (uncredited) |
 Bruno Di Luia | Cast | Actor | Luciano's Henchman (uncredited) |
 Calogero Azzaretto | Cast | Actor | Man of the clan (uncredited) |
 Charles Bronson | Cast | Actor | Joe Valachi |
 Fausto Tozzi | Cast | Actor | Albert Anastasia |
 Franco Borelli | Cast | Actor | Buster |
 Franco Ressel | Cast | Actor | (uncredited) |
 Frank Gio | Cast | Actor | Frank (uncredited) |
 Gerald S. O'Loughlin | Cast | Actor | Ryan, federal agent |
 Gianni Medici | Cast | Actor | |
 Guido Leontini | Cast | Actor | Tony Bender |
 Imelde Marani | Cast | Actress | Donna Petrillo's friend (uncredited) |
 Isabelle Marchall | Cast | Actress | Mary-Lou (uncredited) |
 Jill Ireland | Cast | Actress | Maria Reina Valachi |
 Joe Don Baker | Cast | Actor | Irish member of Valachi gang (uncredited) |
 Joseph Wiseman | Cast | Actor | Salvatore Maranzano |
 Lino Ventura | Cast | Actor | Vito Genovese |
 Mario Pilar | Cast | Actor | Salierno |
 María Baxa | Cast | Actress | Donna Petrillo |
 Nestore Cavaricci | Cast | Actor | Prisoner with Valachi (uncredited) |
 Pupella Maggio | Cast | Actress | Letizia Reina |
 Robert Trout | Cast | Actor | Self (uncredited) |
 Sabine Sun | Cast | Actress | Jane (uncredited) |
Syl Lamont | Cast | Actor | Commander of Fort Monmouth (uncredited) |
 Walter Chiari | Cast | Actor | Dominick Petrilli, aka "Gap" |
 Alfonso Giganti | Cast | Actor | Wedding party guest (uncredited) |
Giacomo De Michelis | Cast | Actor | Augie (uncredited) |
 Ron Gilbert | Cast | Actor | Prison Guard (uncredited) |
 Fred Valleca | Cast | Actor | Buck |
Natasha Chevelev | Cast | Actress | Jane |
 John Alarimo | Cast | Actor | Steven Ferrigno (uncredited) |
Steve Belloise | Cast | Actor | Winnie (uncredited) |
Jason McCallum | Cast | Actor | Donald Valachi (uncredited) |
| Person | Type | Job | Role(s) |
