Woody's Roundup Gang:
* Woody: The brave and loyal cowboy doll.
* Jessie: The sassy and independent cowgirl doll.
* Bullseye: Woody's trusty horse.
* Stinky Pete: The grumpy prospector and Woody's antagonist.
* Prospector: A fellow prospector who becomes Woody's friend.
* Barnaby: A sheepdog and member of the Roundup Gang.
Andy's Toys:
* Buzz Lightyear: The space ranger who is Woody's best friend.
* Mr. Potato Head: The grumpy and often jealous potato toy.
* Mrs. Potato Head: Mr. Potato Head's wife.
* Slinky Dog: The loyal and helpful dachshund toy.
* Rex: The timid and insecure dinosaur toy.
* Hamm: The sarcastic and cynical piggy bank toy.
* Bo Peep: The sheep toy who was missing in Toy Story 1.
* The Aliens: Three little green men who are obsessed with "The Claw."
Other Characters:
* Emperor Zurg: Buzz Lightyear's nemesis.
* Al McWhiggin: The toy collector who wants to steal Woody.
* The Prospector's Henchmen: A group of toys who help the Prospector.
* Andy's Mom: Andy's mother who plays an important role in the film.
* The Toy Story 2 Cast: The voices of the characters are just as important to the film. Tom Hanks (Woody), Tim Allen (Buzz), Joan Cusack (Jessie), Don Rickles (Mr. Potato Head), Wallace Shawn (Rex), John Ratzenberger (Hamm), and many more.
Let me know if you'd like more details on any particular character!