Lennie: 20-30’s; Large, lumbering character with a childlike mentality. Does not understand his own strength.
George: 20-30s; Small, wiry, quick-witted man who travels with and cares for Lennie. George’s behavior is motivated by the desire to protect Lennie and dreams of owning his own farm.
Candy: 50’s-60s; An aging ranch handyman, Candy lost his hand in an accident and worries about his future on the ranch. Fears that his age is making him useless.
The Boss: 40s-50s; The stocky, well-dressed man in charge of the ranch, and Curley’s father. He is never named and appears only once, but seems to be a fair-minded man.
Curley: 20’s; The boss’s son, he is a confrontational, mean-spirited, and aggressive young man who seeks to compensate for his small stature by picking fights with larger men. Recently married, Curley is plagued with jealous suspicions and is extremely possessive of his flirtatious young wife.
Curley’s Wife: 20’s; The only female character in the story. The men on the farm refer to her as a “tramp,” a “tart,” and a “looloo.” She represents the temptation of female sexuality in a male-dominated world. Like the ranch-hands, she is desperately lonely and has broken dreams of a better life.
Slim: 40-50s; The acknowledged “prince” of the ranch, Slim is the only character who seems to be at peace with himself. The other characters often look to Slim for advice.
Carlson: 30s-40s; A ranch-hand, Carlson complains bitterly about Candy’s old, smelly dog. He convinces Candy to put the dog out of its misery.
Whit: any age; a ranch hand; gives back story to some of the play’s characters.
Crooks: 40s-50s; Crooks, the black stable-hand, gets his name from his crooked back. Proud, bitter, and caustically funny, he is isolated from the other men because of the color of his skin.