Five years have passed since Hiccup and Toothless united the dragons and Vikings of Berk. Now, they spend their time charting unmapped territories. During one of their adventures, the pair discover a secret cave that houses hundreds of wild dragons -- and a mysterious dragon rider who turns out to be Hiccup's mother, Valka. Hiccup and Toothless then find themselves at the center of a battle to protect Berk from a power-hungry warrior named Drago.
| Directing | Dean DeBlois | Director |
| Production | John Swanson | Production Manager |
| Crew | Nicolas Weis | Visual Effects Design Consultant |
| Production | Bonnie Arnold | Producer |
| Editing | John K. Carr | Editor |
| Writing | Dean DeBlois | Writer |
| Production | Chris Sanders | Executive Producer |
| Sound | John Powell | Original Music Composer |
| Production | Leslee Feldman | Casting |
| Production | Dean DeBlois | Executive Producer |
| Production | Christi Soper Hilt | Casting |
| Visual Effects | James Baxter | Animation Supervisor |
| Production | Michael A. Connolly | Co-Producer |
| Production | Roy Lee | Co-Producer |
| Production | Aaron Dem | Associate Producer |
| Production | Doug Davison | Co-Producer |
| Production | Kate Spencer | Co-Executive Producer |
| Production | Kendra Haaland | Co-Producer |
| Art | Rodrigo Blaas | Other |
| Crew | Guillermo del Toro | Thanks |
| Crew | Drew Struzan | Thanks |
| Visual Effects | Kevin Andrus | Animation |
| Directing | J.C. Alvarez | Layout |
| Sound | Jeremy Bowker | Sound Effects Editor |
| Editing | James Beshears | Editorial Services |
| Visual Effects | Bill Diaz | Animation |
| Sound | Alexander Rybak | Music |
| Crew | Brent Hutchins | Production Controller |
| Visual Effects | Joe Bowers | Animation |
| Visual Effects | Liron Topaz | Animation |
| Visual Effects | David Drell | Creature Technical Director |
| Crew | Jessica Drake | Dialect Coach |
| Editing | Elmer Quinteros | Editorial Production Assistant |
| Lighting | Dorien Gunnels | Lighting Artist |
| Lighting | Kirill Smolskiy | Lighting Artist |
| Visual Effects | Robert Vignone | Modeling |
| Sound | Owen Slade | Musician |
| Production | Ken Bielenberg | Executive In Charge Of Production |
| Visual Effects | Adam Dotson | Animation |
| Visual Effects | Tal Shwarzman | Animation |
| Visual Effects | Theodore Anthony Lee Ty | Animation |
| Visual Effects | Tony Siruno | Character Designer |
| Visual Effects | Kevin Rodgers | Creature Technical Director |
| Crew | Paul Mounsey | Additional Music |
| Sound | Andrew Findon | Musician |
| Sound | Gary Kettel | Musician |
| Production | Betty Tom | Production Accountant |
| Visual Effects | Michael Amos | Animation |
| Visual Effects | Julien Bocabeille | Animation |
| Visual Effects | Lou Dellarosa | Animation |
| Visual Effects | Rachel Fite | Animation |
| Editing | Mark A. Hester | Associate Editor |
| Crew | Liang-Yuan Wang | CG Supervisor |
| Visual Effects | James E. Stapp | Modeling |
| Sound | Mark Berrow | Musician |
| Crew | Chris Hewitt | Post Production Assistant |
| Production | Corie Zhang | Production Coordinator |
| Visual Effects | Leo Sanchez Barbosa | Character Designer |
| Visual Effects | Nathan Loofbourrow | Creature Technical Director |
| Visual Effects | Kendal Sager | Creature Technical Director |
| Editing | Jabari Phillips | Editorial Coordinator |
| Sound | Sean England | Foley |
| Sound | Pete Anthony | Orchestrator |
| Production | Andrea McCarthy Paul | Production Accountant |
| Production | Sumit Verma | Production Coordinator |
| Production | Tripp Hudson | Executive In Charge Of Production |
| Visual Effects | Andrew Harkins | Animation |
| Visual Effects | Martin P. Hopkins | Animation |
| Visual Effects | Joe Moshier | Character Designer |
| Visual Effects | Dick Walsh | Creature Technical Director |
| Sound | Dee Lewis Clay | Musician |
| Lighting | Jonathan Ciscon | Lighting Artist |
| Lighting | Bert Poole | Lighting Supervisor |
| Visual Effects | Craig Dowsett | Modeling |
| Sound | Thomas A. Carlson | Music Editor |
| Sound | Stephen Henderson | Musician |
| Sound | Andrew Kinney | Orchestrator |
| Crew | John Geller | Post Production Assistant |
| Crew | Leff Lefferts | Sound Design Assistant |
| Visual Effects | Michelle Cowart | Animation |
| Visual Effects | David Polk | Animation |
| Visual Effects | Cliff B. Mitchell | Creature Technical Director |
| Visual Effects | Wade Ryer | Creature Technical Director |
| Production | Terri Anderson | Finance |
| Sound | Pascal Garneau | Foley Editor |
| Lighting | Max Bruce | Lighting Supervisor |
| Sound | Leff Lefferts | Additional Sound Re-Recording Mixer |
| Art | Zhaoping Wei | Art Direction |
| Visual Effects | Cassidy Curtis | Animation |
| Visual Effects | Dug Stanat | Creature Technical Director |
| Lighting | Ruhi Sinha | Lighting Artist |
| Sound | Andrew Wood | Musician |
| Sound | Tommy Laurence | Orchestrator |
| Sound | John Ashton Thomas | Orchestrator |
| Crew | David Farley | Post Production Supervisor |
| Production | Aubrey Millen | Production Coordinator |
| Visual Effects | Louis Flores | VFX Artist |
| Production | Nathan Crommett | Finance |
| Sound | Brian Chumney | ADR Supervisor |
| Sound | Sue Fox | Foley Editor |
| Visual Effects | Thomas Grummt | Lead Animator |
| Sound | Tom Pigott-Smith | Musician |
| Sound | Randy Kerber | Orchestrator |
| Production | Jacquelyn Robbins | Production Accountant |
| Art | Michael Necci | Art Direction |
| Visual Effects | Nayoun Charoenchai | Animation |
| Visual Effects | Alberto Corral | Animation |
| Editing | Shane Glick | Assistant Editor |
| Visual Effects | Li-Lian Ku | Creature Technical Director |
| Crew | K L Sateesh Varma | Compositors |
| Sound | Paul Kimber | Musician |
| Sound | Mary Scully | Musician |
| Sound | Dave Metzger | Orchestrator |
| Production | Tim Kwan | Production Coordinator |
| Production | Tyler M. Saunders | Production Coordinator |
| Crew | Alissa Rowinsky Wright | Legal Services |
| Visual Effects | Bart Coughlin | Creature Technical Director |
| Editing | Lauren Lear | First Assistant Editor |
| Sound | Tom Kramer | Music Editor |
| Sound | Lorne MacDougall | Musician |
| Sound | Anna Noakes | Musician |
| Sound | James Thatcher | Musician |
| Production | Lillian Ritchie | Production Coordinator |
| Visual Effects | Tommie Löfqvist | Animation |
| Visual Effects | Nico Marlet | Character Designer |
| Visual Effects | Daniel Dawson | Creature Technical Director |
| Visual Effects | Hongseo Park | Creature Technical Director |
| Visual Effects | Ferris Webby | Creature Technical Director |
| Production | Ariga Parseghian | Finance |
| Sound | John Barclay | Musician |
| Sound | Jeff Atmajian | Orchestrator |
| Production | Ryan Behnke | Production Coordinator |
| Production | Grace Bisel | Administration |
| Art | Pierre-Olivier Vincent | Production Design |
| Visual Effects | Gaurav Shenai | Creature Technical Director |
| Sound | Robin Harlan | Foley |
| Lighting | Kaki Bage | Lighting Production Assistant |
| Crew | Stephen Bailey | Sequence Supervisor |
| Visual Effects | Charles Ellison | Modeling |
| Visual Effects | Paul Schoeni | Modeling |
| Sound | Andrew Busher | Musician |
| Sound | Rick Giovinazzo | Orchestrator |
| Visual Effects | Laurent Caneiro | Animation |
| Visual Effects | Rani Naamani | Animation |
| Visual Effects | Zakk Bates | Animation |
| Sound | Gavin Greenaway | Conductor |
| Lighting | Joanna Wu | Lighting Supervisor |
| Crew | Shawn Murphy | Mixing Engineer |
| Visual Effects | Marty Havran | Modeling |
| Visual Effects | Sudipta Panja | Modeling |
| Sound | Jason Evans | Musician |
| Production | Curtis W. Thompson | Production Coordinator |
| Visual Effects | Leif Jeffers | Animation |
| Visual Effects | Trisha Butkowski | Creature Technical Director |
| Visual Effects | Jaryd Snover | Creature Technical Director |
| Lighting | Ariel Chisholm | Lighting Artist |
| Lighting | Hannah Sherman | Lighting Artist |
| Visual Effects | Vaibhav Shah | Modeling |
| Production | Jessica Forer | Production Coordinator |
| Production | Deepak Kumar | Production Coordinator |
| Production | Dustin Wheelen | Production Coordinator |
| Visual Effects | Elmer Quinteros | Animation Production Assistant |
| Visual Effects | Jennifer E. Harlow | Animation |
| Visual Effects | Christina N. de Juan | Creature Technical Director |
| Crew | Anthony B. Willis | Additional Music |
| Lighting | Christopher Sprunger | Lighting Artist |
| Visual Effects | Jayanta Mazumder | Modeling |
| Sound | Frank Ricotti | Musician |
| Crew | Alex Cardullo | Post Production Assistant |
| Production | Stephanie Alpert | Production Coordinator |
| Production | Kristen Murtha | Production Coordinator |
| Visual Effects | Ron Pucherelli | Animation |
| Visual Effects | Mike Stern | Animation |
| Visual Effects | Greg Whittaker | Animation |
| Visual Effects | Sebastien Wojda | Animation |
| Production | Mollie Gamo | Casting Associate |
| Visual Effects | Candice Miller | Creature Technical Director |
| Lighting | Milton E. Rodriguez-Rios | Lighting Artist |
| Sound | Steve Mair | Musician |
| Production | Caroline Robinson | Production Supervisor |
| Crew | Sean Sexton | Supervising Animator |
| Visual Effects | Terry Kaleas | VFX Artist |
| Visual Effects | Rahul Mullick | VFX Artist |
| Visual Effects | Desiree Montalvo | Visual Effects Coordinator |
| Visual Effects | Guoqiang Xie | VFX Artist |
| Production | Beth Hofer | Executive In Charge Of Production |
| Production | Angie Howard | Production Manager |
| Production | Aditya Deosthale | Production Supervisor |
| Production | David Hail | Publicist |
| Crew | Nick Wollage | Score Engineer |
| Crew | Rain Angeles | Systems Administrators & Support |
| Visual Effects | Shiben Bhattacharjee | VFX Artist |
| Visual Effects | Ben Sutherland | VFX Artist |
| Crew | Munira Moiz Tayabji | Supervising Technical Director |
| Visual Effects | Dustin Anderson | VFX Artist |
| Visual Effects | Christopher Rydalch | VFX Artist |
| Visual Effects | Stephen Timothy Cooney | VFX Artist |
| Crew | Margaret A. Decker | Software Engineer |
| Visual Effects | Ted Davis | Visual Effects |
| Visual Effects | Carl Hooper | VFX Artist |
| Sound | Al Nelson | Sound Designer |
| Sound | Mac Smith | Sound Effects Editor |
| Crew | Jennifer Smith | Software Engineer |
| Crew | Jakob Hjort Jensen | Supervising Animator |
| Visual Effects | Wes Chilton | VFX Artist |
| Visual Effects | David Lipton | VFX Artist |
| Production | Bonnie Lemon | Executive In Charge Of Production |
| Production | Darci Zalvin | Executive In Charge Of Production |
| Production | Joe Crowley | Production Supervisor |
| Visual Effects | Fangwei Lee | Visual Effects |
| Visual Effects | Jaideep Khadilkar | VFX Artist |
| Visual Effects | Andrew Wheeler | VFX Artist |
| Production | Steven Schweickart | Production Supervisor |
| Sound | Randy Thom | Sound Re-Recording Mixer |
| Sound | Steve Jamerson | Sound Engineer |
| Crew | Linda Sunshine | Thanks |
| Visual Effects | Jeff Budsberg | Visual Effects |
| Sound | Brandon Proctor | ADR & Dubbing |
| Crew | Mark Macready | Systems Administrators & Support |
| Production | Milind D. Shinde | Production Manager |
| Crew | Stephen J. Ward | Software Engineer |
| Crew | Steven Hornby | Supervising Animator |
| Crew | David Torres | Supervising Animator |
| Visual Effects | Brian C. Davis | VFX Artist |
| Visual Effects | Stephanie Mulqueen | VFX Artist |
| Visual Effects | Youxi Woo | VFX Artist |
| Production | Rachnatp | Production Supervisor |
| Camera | Kevin Estrada | Still Photographer |
| Crew | Kristof Serrand | Supervising Animator |
| Visual Effects | Alan Cheney | VFX Artist |
| Visual Effects | Katie Van Maanen | VFX Artist |
| Production | Dinesh Krishnan Nair | Production Manager |
| Production | Cat Thelia | Production Supervisor |
| Sound | Michael Silvers | Supervising Sound Editor |
| Crew | Bart Feliciano | Systems Administrators & Support |
| Visual Effects | Anthony Fung | VFX Artist |
| Visual Effects | Sean Cole | Visual Effects Supervisor |
| Production | Rebecca Huntley | Production Manager |
| Production | Tracy Larson | Production Supervisor |
| Sound | Randy Thom | Supervising Sound Editor |
| Sound | Rachel Bolt | Musician |
| Visual Effects | Jason Porath | VFX Artist |
| Sound | Simon Goldfinch | Sound Engineer |
| Visual Effects | Zach Glynn | VFX Artist |
| Visual Effects | Matt Head | VFX Artist |
| Production | Shane Mulholland | Production Supervisor |
| Crew | Dan Golembeski | Supervising Technical Director |
| Visual Effects | Dave Walvoord | Visual Effects Supervisor |
| Camera | Gil Zimmerman | Director of Photography |
| Art | Simon Otto | Storyboard Artist |
| Crew | Fabio Lignini | Supervising Animator |
| Writing | Cressida Cowell | Book |
