| Mary | Acton | William Acton's wife. |
| Willianm | Acton | A former butcher now the governor at the Marshallsea. |
| Ralph | Anderson | A prisoners in the Common Side. |
| Sarah | Bradshaw | Owned a coffeehouse in the Marshalsea. |
| Charles | Buckley | Tom's oldest friend. |
| Mrs. | Carey | Mrs. Bradshaw's acquaintance. |
| Jack | Carter | One of the prisoners at Marshallsea. |
| Henry | Chapman | A barman in the Marshallsea. |
| Joseph | Cross | A turnkey at Marshalsea. |
| | Darby | Former governor at the Marshallsea. |
| Samuel | Fleet | Tom's roommate. |
| Benjamin | Fletcher | Tom's landlord. |
| Edward | Gilbourne | A deputy protonotary of the Marshallsea Court. |
| John | Grace | Mr Acton's clerk. |
| Gilbert | Hand | Acton's trusty but also ran errands for prisoners. |
| Thomas | Hawkins Jr. | The protagonist. aka: Tom. |
| Rev. Thomas | Hawkins Sr. | Tom Hawkin's father. |
| Mr. | Jenings | A night watchman. |
| Moll | King | Ran a coffeehouse called Moll King's. |
| Mrs. | Mack | McDonnell's wife. |
| Richard | McDonnell | Ran the chophouse known as Titty Dolls. aka: Mack. |
| Constance | Meadows | One of Sir Philip's daughters. |
| Mary | Meadows | One of Sir Philip's daughters. |
| Sir Philip | Meadows | A Knight Marshall and responsible for the Marshalsea. |
| Madame | Migault | A fortune teller. aka: Miggy |
| Harry | Mitchell | Former Captain Roberts' servant. |
| Fred | Owen | Anderson's former ward mate. |
| Matthew | Pugh | A steward. |
| Catherine | Roberts | Captain Roberts' wife. |
| John | Roberts | Jakes' friend. |
| Stephen | Siddall | An apothecary. |
| Mr. | Simmons | John Roberts' old gambling friend. |
| Lizzie | Smith | Tom's acquaintance. |
| Mr. | Smith | Fleet's acquaintance. |
| Catherine | Sparks | Mrs. Bradshaw's maid. aka: Kitty. |
| Nathaniel | Sparks | Kitty's father. |
| Mrs. | Speed | Landlady of the bar. |
| Nemehiah | Whittaker | A baker. |
| James | Wilson | Mary Acton's father. |
| Mrs. | Wilson | Mary Acton's mother. |
| Andrew | Woodburn | A chaplain. |
| Benjamin | | One of Mr. Hand's boys. |
| Betty | | A young maid servant. |
| Edmund | | Tom's step-brother. |
| Emma | | Kitty's mother. |
| Harry | | One of the prisoners. |
| Henry | | Mr. Acton's son. |
| Jakes | | A warrant officer. |
| James | | Sam Fleet's half-brother. |
| Jane | | Tom's sister. |
| Jim | | One of Mr. Hand's boys. |
| Lady Dorothy | | Sir Philip's wife. |
| Matthew | | Mrs. Roberts' son. |
| Sam | | A moon-curser. |
| Trim | | A prisoner and acted as the Master's side barber. |
| Wills | | One of the turnkeys at the Marshalsea. |
