Characters:
George George Milton. A migrant worker who travels from farm to farm with his mentally impaired friend Lennie during the Depression.
Lennie Lennie Small. A gigantic, mentally disabled man, Lennie is simplistic and docile.
Candy An old, crippled man who has lost his hand, Candy is the swamper at the ranch. He remains attached to his aging dog, who has become so weak and sickly that it depends entirely on Candy to survive.
Curley The son of the ranch owner, Curley is a man of short stature who is nevertheless a formidable boxer. Curley is aggressive, boastful and cocky, with a volatile temper and a tendency to provoke conflict.
Curley's wife Generally considered to be a tramp by the men at the ranch, Curley's wife is the only major character in Of Mice and Men whom Steinbeck does not give a name. She dislikes her husband and feels desperately lonely at the ranch.
Crooks The stable buck at the ranch, Crooks is also the only black man in the novel. A proud and bitter man.
Carlson A large, big-stomached man who works at the ranch, Carlson complains about Candy's dog and eventually offers to put the old dog out of its misery. George steals Carlson's gun to shoot Lennie after Curley's wife is murdered.
Slim The jerkline skinner at the ranch, Slim is a seemingly ageless man who carries himself with great gravity. He gives Lennie one of his new litter of puppies to care for
Whit He is one of the workers at the ranch, a young man who shows Carlson the magazine with the letter from William Tenner.
The Boss The boss of the ranch is Curley's father. He acts suspiciously of George and Lennie when they arrive, thinking that there's something odd about the two mismatched companions.
Aunt Clara The woman who raised Lennie. Though deceased, she appears to Lennie in a hallucination when he hides in the brush in Chapter Six.
William Tenner A former worker at the ranch who drove a cultivator, Whit shows Carlson a magazine that has a letter