| Genco | Abbandando | Don Corleone's Consiegliere/Counselor. |
| Kay | Adams | Michael's girlfriend. |
| Mr. | Adams | Kay's father. |
| Mrs. | Adams | Kay's mother. |
| Margot | Ashton | Johnny's 2nd wife. A famous actress. |
| Wax | Baines | The notorious pimp. |
| Emilio | Barzini | The closest ally of Tattaglia Family. |
| Felix | Bocchicchio | The man who took the rap for Michael. |
| Amerigo | Bonasera | A Sicilian-American undertaker. Don Corleone's friend. |
| Luca | Brasi | Don Corleone's personal enforcer. |
| Al | Capone | An American gangster. A crime's boss. |
| Peter | Clemenza | Paulie's boss. One of the Caporegime in the Corleone family. |
| Mrs. | Colombo | The widow that Don Corleone helped. |
| Anthony | Coppola | One of Connie's wedding guests. |
| Carmela | Corleone | Don Corleone's wife. Aka: Mama Corleone. |
| Constanzia | Corleone | Don Corleone's daughter. Aka: Connie. |
| Frederico | Corleone | Don Corleone's 2nd son. Aka: Fred, Fredo. |
| Michael | Corleone | Don Corleon's youngest son. The next Don (later). Aka: Mike. |
| Sandra | Corleone | Sonny's wife. |
| Santino | Corleone | Don Corleone's oldest son. |
| Vito | Corleone | Protagonist. Aka: Don Corleone, Vito Andolini. |
| Ottilio | Cuneo | The Upper New York Don. |
| Jack | Dempsey | The bar owner. |
| Deanna | Dunn | An actress. Johnny's friend. |
| Frank | Falcone | The Don who controlled the movie unions. The Los Angeles Don. |
| Ray | Farrell | The communication operator to Don Corleone's payroll. |
| Ella | Fitzgerald | A Jazz singer. |
| Johnny | Fontaine | Don Corleone's godson. A singer. |
| Virginia | Fontane | Johnny's first wife. Aka: Ginny. |
| Vincent | Forlenza | The Cleveland Don. |
| Paulie | Gatto | One of Clemenza's men. |
| Billy | Goff | The most powerful man in the movie labor. |
| Moe | Greene | A Jewish Mobster. |
| Theresa | Hagen | Tom's wife. |
| Thomas | Hagen | Don Corleon's friend. Aka: Tom. |
| Les | Halley | Johnny's former band leader. |
| John Edgar | Hoover | The director of FBI. |
| Frederick | Kellener | A doctor. Segal's friend. |
| Dr. | Kennedy | The Corleone's family doctor. |
| Rocco | Lampone | Clemenza's associate. |
| Congressman | Luteco | The congressman. |
| Lucy | Mancini | Connie's maid of honor. Sonny's mistress. |
| Salvatorre | Maranzano | A mafioso in New York. |
| Vera | Mario | A restaurant owner. |
| Mark | McCluskey Jr. | The police captain's son. |
| Mark | McCluskey Sr. | The police captain. |
| Roy | McElroy | Waltz's press agent. |
| Anthony | Mollinari | The San Francisco Don. |
| Kevin | Moonan | The punks that Paulie Gatto punished. |
| Sharon | Moore | Johnny's companion. |
| Filomena | Nazorine | Nazorine's wife. |
| Katherine | Nazorine | Nazorine's daughter. |
| Vito | Nazorine | The baker. Don Corleone's childhood friend. |
| Eddie | Neils | A musical arranger. |
| Albert | Neri | Michael's new bodyguard. |
| Domenick | Panza | The Boston Don. |
| John | Phillips | The detective. |
| Sally | Rags | Carlo Rizzi's writer. |
| Carlo | Rizzi | Connie's husband. |
| Mr. | Roberto | Don Corleone's landlord. |
| Jules | Segal | A surgeon. Lucy Mancini's lover. |
| Detective | Siriani | Detective Phillips's partner. |
| Virgil | Sollozo | Don Corleone's enemy. A mobster of the Sicilian mafia. |
| Anthony | Stracci | One of the New York Dons. The New Jersey Don. |
| Bruno | Tattaglia | The nightclub manager. Phillip's youngest son. |
| John | Tattaglia | Phillip's oldest son. |
| Phillip | Tattaglia | Don Corleone's enemy. The prostitution business owner. |
| Dr. | Taza | Tommasino's uncle. |
| Don | Tommasino | The mafia chief. Michael's protector. |
| Carlo | Tramonti | Don Corleone's companion. A gambler. |
| James | Tucker | A doctor. |
| Nino | Valenti | Johnny Fontane's childhood friend. |
| Mr. | Vitelli | The café owner. Apollonia's father |
| Apollonia | Vitteli-Corleone | Michael's wife. |
| Jerry | Wagner | The punks that Paulie Gatto punished. |
| Jack | Woltz | The film producer. |
| Joseph | Zaluchi | The Don of Detroit. |
| Calo | | The man that Michael befriended. Michael's guard. |
| Coach | | Carlo Rizzi's writer. |
| Enzo | | Nazorine's helper. |
| Fabrizzio | | The shepherd. Michael's guard. |
| Fanucci | | The real Mafioso chief. |
| Filomena | | The midwife. |
| Khartoum | | The famed English racing horse. |
| Tessio | | One of Don Corleone's caporegime. |
| Tina | | Johnny's girlfriend. |
| Tommy | | Albert Neri's nephew. |
