| Protagonist | Niko Bellic |
| Central characters | Roman Bellic | Little Jacob | Dimitri Rascalov†| Jimmy Pegorino†| Bernie Crane | Darko Brevic |
| Main characters | Mallorie Bardas | Vladimir Glebov†| Mikhail Faustin†| Brucie Kibbutz | Manny Escuela†| Elizabeta Torres | Patrick McReary | Francis McReary | Gerald McReary | Derrick McReary†| Kate McReary | Playboy X | Dwayne Forge | Ray Boccino†| Phil Bell | United Liberty Paper contact | Jon Gravelli†|
| Radio DJs | Beatrix Fontaine | DJ Green Lantern | DJ Mister Cee†| DJ Premier | François K | Roy Ayers | Femi Kuti | Gary Sheen | Jane Labrador | Jeffron James | Lazlow Jones | Marcel LeMuir | Roy Haynes†| Ryan McFallon | Karl Lagerfeld†| Jimmy Gestapo | Iggy Pop | Bobby Konders | Juliette Lewis | Daddy Yankee | Carl Bradshaw | Vaughn Harper†| Ruslana Lyzhychko |
| Supporting characters | Michelle/Karen | Ilyena Faustin | Isaac Roth†| Kim Young-Guk†| Ray Bulgarin†| Jay Hamilton†| Jim Fitzgerald†| Johnny Klebitz†| Gordon Sargent | Michael Keane†| Maureen McReary | Luis Fernando Lopez | Anthony Corrado†| Stevie | The Fixer | Tony Prince | Bryce Dawkins | Eugene Reaper†| Mohammed | Zorba Philippidis†|
| Minor characters | Adam Dimayev†| Aiden O'Malley†| Alejandra | Alonzo | Andrei†| Angela Allan†| Angie Pegorino | Anna Faustin | Anthony†| Benny†| Bledar Morina†| Bobby Jefferson | Brett | Bucky Sligo†| Catch | Charlie†| Charles Matteo†| Christopher Tibbits | Chuck Williams-Jones | City Official | Clarence's Associate†| Dardan Petrela†| Dave Bosoy†| Doctor Rosem | Eduard Borodin†| Felipe | Frankie Garone†| Frankie Gallo | Jason Michaels†| Jayvon Simson†| Jermaine Andrews | Jimmy | John | John Barbosa†| Joseph DiLeo†| Joseph Kaplan | Kalem†| Karen (Lawyers) | Katerina | Lamon | Larissa Slalom | Lavar Davis†| Lenny Petrovic†| Lori Williams-Jones†| Luca Silvestri†| Lyle Rivas†| Marco Bonnaro†| Mark†| Marlon Bridges†| Mickey | Mitch | Mori Green†| Mr. Fuk's Rice Box manager | Muscovski | Oleg Minkov†| Peter Marchetti†| Priest | Sal†| Sheila Stafford†| Shirley†| Slimeball | Talbot Daniels | Teddy Benavidez†| Thai Prostitute | The Blackmailer†| The Doctor | The Hater†| The Kidnapper†| Kidnapper's Accomplice†| The Truck Driver†| Tom Goldberg†| Tom Rivas†| Tony†| Tony Black†| Trunchez Brothers†| Unnamed Russian Goon | Vasily | Vera | Mason Waylon | Wedding Assassin | Wilson Taylor Sr.†| Unnamed Lost MC Biker†| Sergei | Ed the Mate | Isaac's girlfriend | Westdyke Memorial Hospital Receptionist |
| Girlfriends | Alexandra Chilton | Carmen Ortiz | Kiki Jenkins |
| Random characters | Brian Meech | Mel | Real Badman | Hossan Ramzy | Sara | Pathos | Jeff Harlingford | Marnie Allen | Eddie Low†| Cherise Glover | Cherise Glover's Boyfriend | Clarence Little†| Gracie Ancelotti | Ilyena Faustin | Ivan Bytchkov |
| Petrovic Mafiya | Kenny Petrovic | Lenny Petrovic†|Mrs. Petrovic | Petrovic's Daughter | Anton†| Anton the Rat†| Boris†| Georgi†| Igor | Ivo†| Rami Yalon | Sergey†| Vanya | Vasil†| Vitali | Yuri |
| Most Wanted criminals | Alonso Goralski†| Antonio Rivette†| Barry Lamora†| Bert Reker†| Christov Mahonvic†| Danny Hatmaker†| Darren Covey†| Fernando Tisdel†| Freddy Paparo†| Frederick Harrison†| Glenn Lushbaugh†| Jimmy Kand†| Juan Haimo†| Keenan Burdett†| Leo Brodell†| Lino Friddell†| Marty Boldenow†| Maxwell Caughlin†| Mervin Eskuchen†| Noel Katsuda†| Phil Bacerra†| Preston Pecinovsky†| Rodrigo Stavnes†| Rodney McEniry†| Scott Guzowski†| Sergi Szerbin†| Shon Kikuchi†| Simon Nashly†| Tommy Francovic†| Tyler Pickrel†|
| Mentioned characters | Chan Jaoming†| Fifteen Man Squad | George Lawton | Hsin Jaoming | Huang Lee | Hugh Djas | Joe Lawton | Lester Arnold | Lester Leroc | Mallorie's Cousin | Marko | Mr. Wong | Niko's Brother†| Phyllis | Rudy D'Avanzo†| Rudy D'Avanzo's Father†| Thomas Piretta | Wu "Kenny" Lee†| Zhou Ming†| Tom Pireni | Natalya Shironova |
| Other characters | Rob | Vicki | Yusuf Amir | Troy Harder | Lola Del Rio | Jase | Milica Bellic | Roman's Child | Mila Tadic | Jerry Kapowitz | Horatio Humboldt | Gloria Hole | Steve | Kelly |
| Beta characters | Alyssa Funke | Bradly Narlock | Cletus Luzell | Dick Godley | Marcel Hevas | Marty Connor | Tommy Francini | Wilbert Wetterer |
†denotes Deceased, Italics denotes a status determined by the player's choice
Characters in GTA IV | Category:Characters in GTA IV | Grand Theft Auto IV | Category:Characters |
