| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Bret Haaland | Crew | Production | Executive Producer, Director | 65 |
 Chris Neuhahn | Crew | Production | Producer | 10 |
Dan Milano | Crew | Writing | Writer | 1 |
 Eric Darnell | Crew | Writing | Characters, Creator | 65 |
 Michael Ryan | Crew | Writing | Writer | 15 |
Mitch Watson | Crew | Production | Executive Producer, Writer | 65 |
Nick Filippi | Crew | Production | Producer | 65 |
 Scott Underwood | Crew | Writing | Storyboard | 1 |
 Tom McGrath | Crew | Writing | Characters, Creator | 65 |
Ania O'Hare | Crew | Production | Casting | 65 |
Benjamin Townsend | Crew | Writing | Writer | 1 |
Brandon Sawyer | Crew | Writing | Writer | 1 |
Matt Engstrom | Crew | Directing | Director | 3 |
Randy Dormans | Crew | Production | Producer | 65 |
Steve Evangelatos | Crew | Writing | Storyboard, Director | 1 |
Steven Altiere | Crew | Writing | Writer | 1 |
Nicole Belisle | Crew | Writing | Writer | 2 |
Benjamin Lapides | Crew | Writing | Writer | 6 |
Glenn Harmon | Crew | Art | Additional Storyboarding | 1 |
Sharon Flynn | Crew | Writing | Writer | 16 |
 Ennio Torresan Jr. | Crew | Art | Additional Storyboarding | 1 |
Javier Recio Gracia | Crew | Art | Additional Storyboarding | 1 |
Katie Ely | Crew | Production | Associate Producer | 65 |
Ken Morrissey | Crew | Directing | Director | 1 |
Mark Palmer | Crew | Writing | Writer | 1 |
Shane Atkinson | Crew | Writing | Writer | 1 |
Matt Shire | Crew | Writing | Writer | 1 |
Alejandro Bien-Willner | Crew | Writing | Writer | 1 |
Zesung Kang | Crew | Directing | Director | 1 |
Paul Zeke | Crew | Visual Effects | Animation | 26 |
Jason Dorf | Crew | Writing | Storyboard | 1 |
Christo Stamboliev | Crew | Directing | Director | 14 |
Jenny Keane | Crew | Writing | Writer | 1 |
Grant Calof | Crew | Writing | Writer | 1 |
Michael DeGrandis | Crew | Writing | Writer | 1 |
James Wootton | Crew | Directing | Director | 24 |
Nathan Knetchel | Crew | Writing | Writer | 1 |
 Andy Richter | Cast | Actor | Mort / Ted (voice) | 65 |
 Anjelica Huston | Cast | Actress | Julienne (voice) | 7 |
 Bill Fagerbakke | Cast | Actor | Hans / Rat DJ (voice) | 1 |
 Crispin Freeman | Cast | Actor | Alex (voice) | 1 |
 Danny Jacobs | Cast | Actor | King Julien (voice) | 65 |
 David Koechner | Cast | Actor | Nurse Phantom / Butterfly Prince (voice) | 1 |
 David Krumholtz | Cast | Actor | Timo / Mom-Bot (voice) | 3 |
 Debra Wilson | Cast | Actress | Masikura (voice) | 65 |
 Diedrich Bader | Cast | Actor | Andy / Trevor (voice) | 1 |
 Dwight Schultz | Cast | Actor | Karl / Karl-Gram (voice) | 1 |
 Frank Welker | Cast | Actor | Grandpa Mort (voice) | 1 |
 Grey DeLisle | Cast | Actress | Additional Voices | 1 |
 H. Jon Benjamin | Cast | Actor | Fred the Giant Scorpion (voice) | 2 |
 Henry Winkler | Cast | Actor | Uncle King Julien (voice) | 11 |
 JB Blanc | Cast | Actor | Rat Bartender (voice) | 1 |
 James Urbaniak | Cast | Actor | Lemur #1 (voice) | 1 |
 Jeff Bennett | Cast | Actor | Horst / Hector / Willie / Sage (voice) | 65 |
 John DiMaggio | Cast | Actor | Jumping Rat #1 / Jumping Rat #2 / Jumping Rat #3 (voice) | 1 |
 John Michael Higgins | Cast | Actor | Barty (voice) | 7 |
 Kevin Michael Richardson | Cast | Actor | Maurice (voice) | 65 |
 Lance Henriksen | Cast | Actor | Doc Sugarfoot (voice) | 1 |
 Maurice LaMarche | Cast | Actor | Koto / Corpse (voice) | 1 |
 Max Greenfield | Cast | Actor | Kipper (voice) | 1 |
 Rob Paulsen | Cast | Actor | Brodney / Snake (voice) | 1 |
 Sarah Thyre | Cast | Actress | Becca / Dorothy (voice) | 65 |
 Susanne Blakeslee | Cast | Actress | Butterfly Queen (voice) | 1 |
 Glen Powell | Cast | Actor | Trent (voice) | 1 |
 Kari Wahlgren | Cast | Actress | Female King Julien (voice) | 1 |
 Kether Donohue | Cast | Actress | April (voice) | 1 |
 Lance Barber | Cast | Actor | Bruce (voice) | 1 |
 Ellie Kemper | Cast | Actress | Karen (voice) | 1 |
 India de Beaufort | Cast | Actress | Clover / Crimson (voice) | 65 |
 Betsy Sodaro | Cast | Actress | Xixi (voice) | 65 |
Barbara Heller | Cast | Parrot (voice) | 1 | |
| Person | Type | Job | Role(s) | Episodes |
