Een epos dat zich afspeelt in New York, aan het begin van de 20ste eeuw. David Aaronson en Maximilian Bercovicz vormen met drie anderen een jeugdbende. Een paar jaar daarna zijn ze gangsters geworden en hebben de macht tijdens de drooglegging.
Nee, helaas is Once Upon a Time in America nog niet beschikbaar op Netflix in Nederland.
| Directing | Sergio Leone | Director |
| Costume & Make-Up | Gabriella Pescucci | Costume Design |
| Crew | Gabe Videla | Special Effects |
| Crew | Danilo Bollettini | Special Effects |
| Crew | Giovanni Corridori | Special Effects |
| Sound | Ennio Morricone | Original Music Composer |
| Production | Claudio Mancini | Executive Producer |
| Production | Joy Todd | Casting |
| Camera | Carlo Tafani | Camera Operator |
| Lighting | Romano Mancini | Lighting Technician |
| Production | Arnon Milchan | Producer |
| Production | Cis Corman | Casting |
| Crew | Stuart Kaminsky | Additional Dialogue |
| Writing | Leonardo Benvenuti | Screenplay |
| Writing | Piero De Bernardi | Screenplay |
| Writing | Enrico Medioli | Screenplay |
| Writing | Franco Arcalli | Screenplay |
| Writing | Franco Ferrini | Screenplay |
| Writing | Sergio Leone | Screenplay |
| Writing | Harry Grey | Novel |
| Crew | Jacques Godbout | Special Effects |
| Costume & Make-Up | Vincenzo Cardella | Hairstylist |
| Costume & Make-Up | Maria Teresa Corridoni | Hairstylist |
| Costume & Make-Up | Renata Magnanti | Hairstylist |
| Costume & Make-Up | Randy Coronato | Hairstylist |
| Costume & Make-Up | Randy Coronato | Makeup Artist |
| Costume & Make-Up | Nilo Jacoponi | Makeup Artist |
| Costume & Make-Up | Manlio Rocchetti | Makeup Artist |
| Costume & Make-Up | Gino Zamprioli | Makeup Artist |
| Production | Fred C. Caruso | Executive In Charge Of Production |
| Production | Mario Cotone | Production Supervisor |
| Production | Walter Massi | Unit Manager |
| Production | Ginette Hardy | Production Manager |
| Editing | Nino Baragli | Editor |
| Production | David Bailey | Extras Casting Assistant |
| Camera | Tonino Delli Colli | Director of Photography |
| Art | Giovanni Natalucci | Production Design |
| Art | Carlo Simi | Art Direction |
| Art | James T. Singelis | Art Direction |
| Art | Bruno Cesari | Set Decoration |
| Art | Osvaldo Desideri | Set Decoration |
| Art | Gretchen Rau | Set Decoration |
| Costume & Make-Up | Henry R. Dwork | Makeup Artist |
| Costume & Make-Up | Giancarlo De Leonardis | Hairstylist |
| Directing | Dennis T. Benatar | Assistant Director |
| Directing | Philippe Landoulsi | Assistant Director |
| Directing | Luca Morsella | Assistant Director |
| Directing | Fabrizio Sergenti Castellani | First Assistant Director |
| Directing | Amy Wells | Assistant Director |
| Art | Ronald Fauteux | Props |
| Art | Gianni Fiumi | Property Master |
| Art | Alain Giguère | Painter |
| Art | Nello Giorgetti | Swing |
| Art | Steven Kirshoff | Props |
| Art | Walter Klymkiw | Head Carpenter |
| Art | Joey Litto | Construction Coordinator |
| Art | Tullio Lullo | Construction Coordinator |
| Art | Roberto Magagnini | Props |
| Art | Claude Simard | Head Carpenter |
| Art | Martin Cats | Props |
| Art | Dan Mahoney | Construction Grip |
| Art | Kathy Wolf | Painter |
| Sound | Fabio Ancillai | Boom Operator |
| Sound | Italo Cameracanna | Foley Artist |
| Sound | Italo Cameracanna | Sound Effects Editor |
| Sound | Fernando Caso | Sound Effects Editor |
| Sound | Bruno Charier | Boom Operator |
| Sound | Enzo Diliberto | Foley Artist |
| Sound | Alvaro Gramigna | Foley Artist |
| Sound | Fabio Palmisano | ADR Editor |
| Sound | Daniele Quadroli | Sound Effects Editor |
| Sound | Massimo Rinchiusi | ADR Editor |
| Sound | Jean-Pierre Ruh | Sound Engineer |
| Sound | Jacques Thomas-Gérard | Sound Re-Recording Mixer |
| Sound | Luigi Porto | Sound Assistant |
| Sound | Elliot Tyson | Sound Re-Recording Mixer |
| Crew | Louis Craig | Special Effects Assistant |
| Crew | André Laperrière | Special Effects Technician |
| Crew | Steve Lombardi | Special Effects Coordinator |
| Crew | Olivier Zenenski | Special Effects Assistant |
| Crew | Brian Campbell | Special Effects |
| Crew | Benito Stefanelli | Stunt Coordinator |
| Camera | Steve Baker | Key Grip |
| Camera | Sandro Battaglia | Assistant Camera |
| Camera | Rodney Bauer | Grip |
| Camera | Elio Bosi | Grip |
| Lighting | Marco Contaldo | Electrician |
| Camera | Augusto Diamanti | Key Grip |
| Camera | Amato Gabotti | Grip |
| Camera | Normand Guy | Key Grip |
| Lighting | Walter Klymkiw | Gaffer |
| Lighting | Romano Mancini | Gaffer |
| Lighting | John Newby | Gaffer |
| Camera | Crescenzo G.P. Notarile | Assistant Camera |
| Camera | Angelo Novi | Still Photographer |
| Camera | Antonio Scaramuzza | Assistant Camera |
| Camera | Kurt Thompson | Dolly Grip |
| Lighting | Carlo Vinciguerra | Gaffer |
| Camera | Eraldo Barbona | Grip |
| Lighting | Edward Cohen | Electrician |
| Lighting | Jean Courteau | Electrician |
| Production | Sylvie Bourque | Extras Casting |
| Production | Flo Gallant | Extras Casting |
| Costume & Make-Up | Helen P. Butler | Costumer |
| Costume & Make-Up | Marina Frassine | Assistant Costume Designer |
| Costume & Make-Up | Dougie Hawkes | Costumer |
| Costume & Make-Up | Raffaella Leone | Assistant Costume Designer |
| Editing | Alessandro Baragli | Assistant Editor |
| Editing | Patrizia Ceresani | Assistant Editor |
| Editing | Ornella Chistolini | Assistant Editor |
| Editing | Lizi Gelber | Assistant Editor |
| Editing | Zach Staenberg | Additional Editor |
| Editing | Elvira Tonini | First Assistant Editor |
| Editing | Giorgio Venturoli | Assistant Editor |
| Editing | J. Kathleen Gibson | First Assistant Editor |
| Editing | Howard Heard | Assistant Editor |
| Production | Pierre Laberge | Location Manager |
| Production | Robert Rothbard | Location Manager |
| Production | Attilio Viti | Location Manager |
| Sound | Edda Dell'Orso | Vocals |
| Sound | Ennio Morricone | Music Director |
| Sound | Gheorghe Zamfir | Musician |
| Sound | Pierluigi Pietroniro | Musician |
| Crew | James Giblin | Transportation Captain |
| Crew | Patrick Hogan | Transportation Captain |
| Crew | Bobby Marsh | Driver |
| Production | Francesca Alatri | Production Secretary |
| Crew | Bruce Bahrenburg | Unit Publicist |
| Production | Robert Benmussa | Consulting Producer |
| Production | Dominique Bruballa | Accountant |
| Production | Fausto Capozzi | Accountant |
| Production | Maurizio Cusano | Production Assistant |
| Production | Diana Di Michele | Accountant |
| Production | Lucie Drolet | Accountant |
| Production | Gail Kearns | Production Coordinator |
| Production | Antonio Palombi | Production Assistant |
| Production | Sergio Rosa | Accountant |
| Production | Pietro Sassaroli | Production Assistant |
| Production | Jennifer W. Shore | Production Secretary |
| Production | Eric P. Steckler | Production Assistant |
| Production | Reuben Gonzalez | Production Assistant |
| Production | Simona Patitucci | Production Assistant |
| Crew | Eugene Rizzo | Unit Publicist |
| Production | Danièle Rohrbach | Production Coordinator |
| Crew | Hedy Martinelli | Thanks |
| Sound | Chris David | Dolby Consultant |
