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 | Ben Washam | Director |
| Directing | Chuck Jones | Director |
| Writing | Dr. Seuss | Teleplay |
| Production | Dr. Seuss | Producer |
| Production | Chuck Jones | Producer |
| Sound | Eugene Poddany | Music |
| Art | Maurice Noble | Production Design |
| Visual Effects | Ben Washam | Animation |
| Visual Effects | Irven Spence | Animation |
| Visual Effects | Phil Roman | Animation |
| Visual Effects | Hal Ambro | Animation |
| Visual Effects | Richard Thompson | Animation |
| Visual Effects | Carl Bell | Animation |
| Visual Effects | Tom Ray | Animation |
| Visual Effects | George Nicholas | Animation |
| Art | Philip DeGuard | Background Designer |
| Art | Irv Wyner | Background Designer |
| Art | Angel Esparza | Background Designer |
| Visual Effects | Don Morgan | Layout Supervisor |
| Art | Don Foster | Graphic Designer |
| Writing | Dr. Seuss | Book |
