The ultimate X-Men ensemble fights a war for the survival of the species across two time periods as they join forces with their younger selves in an epic battle that must change the past – to save our future.
| Directing | Bryan Singer | Director |
| Production | Lauren Shuler Donner | Producer |
| Production | Bryan Singer | Producer |
| Production | Simon Kinberg | Producer |
| Production | Stan Lee | Executive Producer |
| Production | Josh McLaglen | Executive Producer |
| Production | Todd Hallowell | Executive Producer |
| Crew | John Byrne | Graphic Novel Illustrator |
| Costume & Make-Up | Ve Neill | Makeup Artist |
| Sound | John Ottman | Original Music Composer |
| Writing | Simon Kinberg | Screenplay |
| Writing | Jane Goldman | Story |
| Writing | Simon Kinberg | Story |
| Writing | Matthew Vaughn | Story |
| Camera | Newton Thomas Sigel | Director of Photography |
| Art | John Myhre | Production Design |
| Production | Andrea Kenyon | Casting |
| Production | Roger Mussenden | Casting |
| Production | Randi Wells | Casting |
| Art | Ravi Bansal | Art Direction |
| Art | Vincent Gingras-Liberali | Art Direction |
| Art | Félix Larivière-Charron | Art Direction |
| Art | Gordon Sim | Set Decoration |
| Art | Ann Smart | Set Decoration |
| Costume & Make-Up | Louise Mingenbach | Costume Design |
| Costume & Make-Up | Norma Hill-Patton | Makeup Department Head |
| Costume & Make-Up | Annick Chartier | Makeup Department Head |
| Art | Jean-Andre Carriere | Set Designer |
| Art | Brent Lambert | Set Designer |
| Art | Raymond Larose | Set Designer |
| Art | Lucie Tremblay | Set Designer |
| Art | Blanche Moreau | Art Department Coordinator |
| Art | Alain Giguère | Lead Painter |
| Sound | Craig Berkey | Sound Designer |
| Sound | Craig Berkey | Supervising Sound Editor |
| Sound | Norman Bernard | Boom Operator |
| Sound | Maxime Ferland | Boom Operator |
| Sound | Warren Hendriks | Sound Designer |
| Sound | Chuck Michael | Sound Designer |
| Sound | Dan O'Connell | Foley |
| Sound | Ai-Ling Lee | Sound Effects Editor |
| Sound | Ron Bartlett | Sound Re-Recording Mixer |
| Sound | Doug Hemphill | Sound Re-Recording Mixer |
| Visual Effects | Blondel Aidoo | Visual Effects Producer |
| Visual Effects | Daniel Brimer | Visual Effects Producer |
| Visual Effects | Paul Butterworth | Visual Effects Supervisor |
| Crew | Mark Carr | Visual Effects Editor |
| Crew | Ryan Chavez | Visual Effects Editor |
| Visual Effects | Tim Crosbie | Visual Effects Supervisor |
| Visual Effects | Alice Cumbaa | Visual Effects Producer |
| Visual Effects | Robin L. D'Arcy | Visual Effects Producer |
| Visual Effects | Max Leonard | Visual Effects Producer |
| Visual Effects | Jinnie Pak | Visual Effects Producer |
| Visual Effects | Richard Stammers | Visual Effects Supervisor |
| Visual Effects | Holger Voss | Visual Effects Supervisor |
| Crew | James M. Churchman | Stunt Coordinator |
| Crew | Jeff Habberstad | Stunt Coordinator |
| Crew | Trevor Habberstad | Stunt Coordinator |
| Costume & Make-Up | Blanche Boileau | Costume Supervisor |
| Costume & Make-Up | Bob Morgan | Costume Supervisor |
| Costume & Make-Up | Julie Amyot | Set Costumer |
| Sound | Amanda Goodpaster | Music Editor |
| Crew | Daniel Matthews | Transportation Coordinator |
| Crew | John Bober | Transportation Captain |
| Crew | Eric Béliveau | Transportation Co-Captain |
| Directing | Christine Wilson | Script Supervisor |
| Production | Michèle St-Arnaud | Location Manager |
| Production | Lisa Fozzati | Location Manager |
| Crew | Brian N. Bentley | Compositors |
| Visual Effects | Tony Mecca | Animation |
| Visual Effects | James Baker | Visual Effects |
| Crew | Chris O'Connell | Visual Effects Editor |
| Art | Michele Laliberte | Supervising Art Director |
| Crew | Mark Edward Wright | Visual Effects Editor |
| Production | Hutch Parker | Producer |
| Production | Derek Hoffman | Associate Producer |
| Production | Jason Taylor | Co-Producer |
| Costume & Make-Up | Mirela Rupic | Assistant Costume Designer |
| Art | Simone Leclerc | Property Master |
| Sound | Patrick Rousseau | Sound Recordist |
| Sound | Susan Dawes | Dialogue Editor |
| Sound | Kerry Dean Williams | Supervising ADR Editor |
| Sound | Laura Graham | ADR Editor |
| Crew | John Walsh | Stunts |
| Visual Effects | Laraib Atta | VFX Artist |
| Visual Effects | Anders Langlands | VFX Supervisor |
| Visual Effects | Cameron Waldbauer | Special Effects Supervisor |
| Visual Effects | Lou Pecora | Visual Effects Supervisor |
| Sound | Byron Thames | ADR & Dubbing |
| Costume & Make-Up | Jerad Marantz | Costume Illustrator |
| Crew | Alain Moussi | Stunt Double |
| Art | Maciej Kuciara | Concept Artist |
| Crew | Renae Moneymaker | Stunt Double |
| Crew | Renae Moneymaker | Fight Choreographer |
| Directing | Brian Smrz | Second Unit Director |
| Directing | Josh McLaglen | First Assistant Director |
| Crew | Jason Bell | Stunts |
| Crew | Hélèna Laliberté | Stunts |
| Crew | Jean Frenette | Utility Stunts |
| Editing | John Ottman | Editor |
| Production | Tom Cohen | Associate Producer |
| Production | Kathleen McGill | Unit Production Manager |
| Directing | Bethan Mowat | Second Assistant Director |
| Editing | Michael Louis Hill | Co-Editor |
| Production | Kathleen McGill | Associate Producer |
| Production | Daniel Auclair | Production Manager |
| Production | Justin Haut | Production Supervisor |
| Production | Josianne Mailloux | Production Coordinator |
| Camera | François Daignault | Steadicam Operator |
| Camera | François Daignault | "A" Camera Operator |
| Camera | Sylvaine Dufaux | "B" Camera Operator |
| Camera | Cary Lalonde | First Assistant "A" Camera |
| Camera | Dany Racine | First Assistant "B" Camera |
| Camera | Soupharak Keoborakoth | Second Assistant "B" Camera |
| Camera | Nicolas René | Second Assistant "B" Camera |
| Camera | Roch Boucher | Second Assistant "A" Camera |
| Camera | Eric Aubin | Second Assistant Camera |
