* Ponyboy Curtis: The protagonist of the novel. He is a 14-year-old boy from a poor family. He is intelligent, sensitive, and artistic, but he is also tough and rebellious.
* Johnny Cade: Ponyboy's best friend. He is a 16-year-old boy from an abusive home. He is small, shy, and insecure, but he is also loyal and brave.
* Darrel "Darry" Curtis: Ponyboy's older brother. He is a 20-year-old mechanic who works hard to support his family. He is tough, responsible, and protective of Ponyboy.
* Sodapop Curtis: Ponyboy's other older brother. He is a 17-year-old high school dropout who works at a gas station. He is charming, outgoing, and easygoing.
* Steve Randle: A member of the Greasers. He is a tough, hot-headed boy who is always looking for a fight.
* Two-Bit Mathews: A member of the Greasers. He is a wisecracking, mischievous boy who is always getting into trouble.
The Socs:
* Bob Sheldon: A member of the Socs. He is a wealthy, arrogant, and violent boy who is always looking for a confrontation with the Greasers.
* Randy Adderson: A member of the Socs. He is a more moderate and reasonable Soc who tries to avoid violence.
* Cherry Valance: A Soc who is attracted to Ponyboy. She is intelligent, kind, and open-minded, and she challenges Ponyboy's prejudices about the Socs.