Horton ontdekt dat er een microscopische gemeenschap van intelligente wezens, genaamd de Whos, op een plant woont die alleen hij kan horen. Hij herkent de gevaren waarmee ze geconfronteerd worden en besluit ze te beschermen.
Nee, helaas is Horton Hears a Who! nog niet beschikbaar op Netflix in Nederland.
| Directing | Chuck Jones | Director |
| Directing | Ben Washam | Director |
| Writing | Dr. Seuss | Teleplay |
| Production | Dr. Seuss | Producer |
| Visual Effects | Carl Bell | Animation |
| Visual Effects | George Nicholas | Animation |
| Visual Effects | Tom Ray | Animation |
| Production | Chuck Jones | Producer |
| Art | Maurice Noble | Production Design |
| Visual Effects | Ben Washam | Animation |
| Art | Angel Esparza | Background Designer |
| Visual Effects | Hal Ambro | Animation |
| Visual Effects | Irven Spence | Animation |
| Visual Effects | Phil Roman | Animation |
| Art | Philip DeGuard | Background Designer |
| Art | Irv Wyner | Background Designer |
| Sound | Eugene Poddany | Music |
| Visual Effects | Richard Thompson | Animation |
| Art | Don Foster | Graphic Designer |
| Visual Effects | Don Morgan | Layout Supervisor |
| Writing | Dr. Seuss | Book |
