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| Character | Original voice actor | Animated debut |
|---|---|---|
| The Octopus | Frank Welker | Return to Never Land |
| Oliver | Joey Lawrence | Oliver & Company |
| Olivia Flaversham | Susanne Pollatschek | The Great Mouse Detective |
| Ollie the Pig | Charlie Dell | Home on the Range |
| Onus | Corey Burton | Treasure Planet |
| Orddu, Orwen and Orgoch | Eda Reiss Merin Adele Malis-Morey Billie Hayes |
The Black Cauldron |
| Orville | Jim Jordan | The Rescuers |
| Oswald the Lucky Rabbit | Frank Welker | Trolley Troubles |
| Otto | J. Pat O'Malley | Robin Hood |
| Owl | Hal Smith | Winnie the Pooh and the Honey Tree |
Read more about this topic: List Of Disney Animated Characters