| Person | Type | Job | Role(s) |
|---|---|---|---|
 Audrey Geisel | Crew | Production | Executive Producer |
 Chris Renaud | Crew | Production | Executive Producer |
 Chris Meledandri | Crew | Production | Producer |
Colin Stimpson | Crew | Art | Art Direction |
 Danny Elfman | Crew | Sound | Music |
 Dave Rosenbaum | Crew | Production | Production Manager |
 David Acord | Crew | Sound | Sound Designer |
 Dennis Leonard | Crew | Sound | Supervising Sound Editor |
 Dr. Seuss | Crew | Writing | Book |
Eileen Godoy | Crew | Crew | Post Production Supervisor |
Jim Likowski | Crew | Sound | Foley Editor |
 Janet Healy | Crew | Production | Producer |
Jeannine Berger | Crew | Crew | Post Production Supervisor |
 John Roesch | Crew | Sound | Foley Artist |
Jonathan Greber | Crew | Sound | Dialogue Editor |
 Scott Mosier | Crew | Production | Producer, Director |
 Tommy Swerdlow | Crew | Writing | Screenplay |
 Yarrow Cheney | Crew | Directing | Director |
Brett Hoffman | Crew | Production | Associate Producer |
Cinzia Angelini | Crew | Art | Storyboard Artist |
Michael LeSieur | Crew | Writing | Screenplay |
Pascal Garneau | Crew | Sound | Sound Effects Editor |
 Robert Taylor | Crew | Production | Associate Producer |
Christopher Flick | Crew | Sound | Foley Supervisor |
Blake Collins | Crew | Sound | Foley Mixer |
 Miguel Jiron | Crew | Art | Storyboard Artist |
Chris Cartagena | Crew | Editing | Editor |
Geoff Vaughan | Crew | Sound | Foley Artist |
Charles Seignolle | Crew | Visual Effects | VFX Supervisor |
Gaëlle Santamarta | Crew | Production | Assistant Production Manager |
Delphine Le Roch | Crew | Production | Production Supervisor |
 Bonnie Wild | Crew | Sound | Sound Effects Editor |
Tom Brown | Crew | Sound | Music Arranger |
 Benjamin Faure | Crew | Visual Effects | Animation |
 Aaron Fors | Cast | Actor | Additional Voices (voice) |
 Angela Lansbury | Cast | Actress | Mayor McGerkle (voice) |
 Barbara Harris | Cast | Actress | Additional Voices (voice) |
 Bill Farmer | Cast | Actor | Additional Voices (voice) |
 Carlos Alazraqui | Cast | Actor | Additional Voices (voice) |
 Cathy Cavadini | Cast | Actress | Additional Voices (voice) |
 Danny Mann | Cast | Actor | Additional Voices (voice) |
 Doug Burch | Cast | Actor | Additional Voices (voice) |
 Frank Welker | Cast | Actor | Max / Fred (voice) |
 Jeremy Maxwell | Cast | Actor | Additional Voices (voice) |
 Jess Harnell | Cast | Actor | Additional Voices (voice) |
 Jim Ward | Cast | Actor | Additional Voices (voice) |
 Joel Swetow | Cast | Actor | Additional Voices (voice) |
 John DeMita | Cast | Actor | Additional Voices (voice) |
 John Kassir | Cast | Actor | Additional Voices (voice) |
 Kenan Thompson | Cast | Actor | Bricklebaum (voice) |
 Laraine Newman | Cast | Actress | Additional Voices (voice) |
 Lori Alan | Cast | Actress | Additional Voices (voice) |
 Michael Beattie | Cast | Actor | Store Clerk (voice) |
 Mindy Sterling | Cast | Actress | Additional Voices (voice) |
 Rashida Jones | Cast | Actress | Donna Lou Who (voice) |
Scott Mosier | Cast | Actor | Additional Voices (voice) |
 Tara Strong | Cast | Actress | Additional Voices (voice) |
 Townsend Coleman | Cast | Actor | Additional Voices (voice) |
 Benedict Cumberbatch | Cast | Actor | Grinch (voice) |
 Brian T. Delaney | Cast | Actor | Additional Voices (voice) |
 Pharrell Williams | Cast | Actor | Narrator (voice) |
 Regina Taufen | Cast | Actress | Additional Voices (voice) |
 Willow Geer | Cast | Actress | Additional Voices (voice) |
 Evan Kishiyama | Cast | Additional Voices (voice) | |
 Carter Hastings | Cast | Actor | Additional Voices (voice) |
 Sam Lavagnino | Cast | Actor | Ozzy (voice) |
 Scarlett Estevez | Cast | Actress | Izzy (voice) |
 Meilee Condron | Cast | Actress | Additional Voices (Voice) |
 Tristan O'Hare | Cast | Groopert (voice) | |
 Tucker Chandler | Cast | Actor | Additional Voices (voice) |
 Ramone Hamilton | Cast | Actor | Axl (voice) |
 Alex Puccinelli | Cast | Actor | Additional Voices (voice) |
 Abby Craden | Cast | Actress | Additional Voices (voice) |
 Cameron Seely | Cast | Actress | Cindy Lou Who (voice) |
Dashiell Priestley | Cast | Additional Voices (voice) | |
Emma Elizabeth Shannon | Cast | Additional Voices (voice) | |
| Person | Type | Job | Role(s) |
