Over the years Oscar the Grouch has had many pets. His diverse menagerie includes various dogs, a cat, a pig, several elephants, and a donkey. His favorite pet is his worm, Slimey.
various other elephants, including Sophie, Blitzen, Schopenhauer, Wolfgang, Sabrina
- In Episode 0590 and Episode 0619, Oscar has a pet fly, Frank.
- In Episode 0793, Grover offers to become Oscar's pet, however it doesn't work out.
- In Episode 1266, Oscar owns a whale named Moby Richard.
- In Episode 1269, Oscar keeps a cow named Chloris.
- In Episode 1441, Oscar feeds multiple cows, horses, chickens and pigs in his can.
- In Episode 1449, Oscar tells Telly and Susan that he has a whole flock of moths in his can, which he gives holeless shirts to munch on.
- In Episode 1740, he mentions he has hippos in his can (who reside in his swimming pool).
- In Episode 2971, he's seen with a pet cow (Esme), chicken (Jezabel) and fish (Fred).
- In the Elmo's World installment on Farms, Oscar reveals that he has an entire farm in his trash can.
- Similar to a pet, Oscar builds Charles the Robot to follow his every command.
- Moby Jane, a whale mentioned in Episode 2269
- Portia, a rhino