| 1 | Truck | Driver | A heavy, red-faced man with broad shoulders. |
| | Tommy | Joad | Ex-convict. Protagonist. aka: The Hitchhiker. |
| | Old Tom | Joad | Tommy's father. |
| | Jim | Casy | Former reverend. Tommy's friend. |
| | Muley | Graves | Tommy's friend. |
| | John | | Tommy's uncle. |
| | Willy | | Tommy's old neighbor. Sheriff. |
| | Ma | | Tommy's mother. |
| 2 | Noah | Joad | Tommy's older brother. |
| | William James | Joad | Tommy's grandfather. aka: Grandpa. |
| | Grandma | | Tommy's grandmother. |
| | Al | Joad | Tommy's younger brother. |
| | Rosasharn | Joad Rivers | Connie's wife. Tommy's sister. |
| | Connie | Rivers | Rosasharn's husband. |
| | Ruthie | | Tommy's little sister. |
| | Winfield | | Tommy's little sister. |
| 3 | | | Highway 66 - Main route for people in-flight. |
| | Ivy | Wilson | A thin man living along Highway 66. |
| | Sairy | Wilson | Ivy's wife. |
| | Will | Wilson | Ivy's brother. |
| 6 | Floyd | Knowles | A young man in Hooverville. The Joads's acquaintance. |
| 7 | The | Guard | A guard on Government Camp. |
| | Timothy | Wallace | Tommy's friend and neighbor. An old man. |
| | Wilkie | Wallace | Timothy's son. |
| | Mr. | Thomas | Timothy's boss. |
| | Jule | | Lives in Government Camp. Half Cherokee Indian. |
| 8 | George | | Policeman. |
| 9 | Aggie | Wainright | Al's fiance. |
| | Mrs. | Wainwright | Aggie's mother. |
