1 | Tom | Sawyer | Protagonist. aka: Thomas Sawyer. |
| Polly | | Tom's aunt. |
| Jim | | Aunt Polly's slave. Small, colored boy. |
| Sidney | | Tom's little brother. aka: Sid, Siddy. |
| | | St. Petersburg - Tom's village. |
2 | Ben | Rogers | Boy who likes imagining he's the captain of a boat. |
| Billy | Fisher | Tom's friend. |
| Johnny | Miller | Tom's friend. |
3 | Joe | Harper | Tom's best friend. General. aka: Joseph Harper. |
| Jeff | Thatcher | Tom's friend. Becky's cousin. |
| Amy | Lawrence | Tom's first love. |
| Mary | | Tom's cousin. |
4 | Mr. | Walters | Tom's Sunday-school teacher. |
| Judge | Thatcher | Jeff's brother. Becky's father. |
5 | Widow | Douglas | A rich, kind, and generous woman in St. Petersburg. |
| Mrs. | Ward | A woman from Church. |
| | Riverson | Lawyer. |
| Mr. | Sprague | Reverend. |
| Willie | Mufferson | St. Petersburg's model boy. |
6 | Huckleberry | Finn | Tom's friend. Son of the town's drunkard. |
| Johnny | Baker | Jeff's acquaintance. |
| Jim | Hollis | Johnny's acquaintance. |
| Bob | Tanner | The wartiest boy in town. |
| Mother | Hopkins | Witch. |
| Hoss | Williams | A dead man. |
| The | Schoolmaster | A teacher in Tom's school. |
| Becky | Thatcher | Judge Thatcher's daughter. Tom's love interest.
Aka: Rebecca. |
8 | Jimmy | Hodges | A dead boy. |
| Injun | Joe | A violent man. Killer. |
| Sheriff | Potter | Drunk man. aka: Muff Potter. |
| Dr. | Robinson | A doctor who steals bodies from their graves. |
10 | Gracie | Miller | Johnny M.'s sister. Burned girl from the Kitchen fire. |
12 | Peter | | Polly's pet. |
15 | Sereny | Harper | Joe's mother. |
| Bill | Turner | The boy who drowned. |
20 | Mr. | Dobbins | Schoolmaster. |
| Susan | Harper | Joe's sister. Serent's daughter. |
| Alfred | Temple | New boy in the village. Tom's enemy. |
22 | Judge | Frazer | A justice of Peace. An old, bed-ridden man. |
| Mr. | Benton | United States senator. |
28 | Uncle | Jake | Servant of Ben's father. |
30 | Mr. | Jones | Huck's acquaintance. Saved Widow Douglas's life. |