| Mark Wahlberg | Sgt. Tommy Saunders |
| John Goodman | Commissioner Ed Davis |
| J.K. Simmons | Sgt. Jeffrey Pugliese |
| Michelle Monaghan | Carol Saunders |
| Kevin Bacon | Richard Deslauriers |
| Michael Beach | Gov. Deval Patrick |
| Christopher O'Shea | Patrick Downes |
| Rachel Brosnahan | Jessica Kensky |
| Jake Picking | Sean Collier |
| Themo Melikidze | Tamerlan Tsarnaev |
| Alex Wolff | Dzhokhar Tsarnaev |
| Melissa Benoist | Katherine Russell |
| Khandi Alexander | Police Interrogator |
| Lana Condor | Li |
| Erica McDermott | Carol's Sister |
| Vincent Curatola | Mayor Thomas Menino |
| Jimmy O. Yang | Dun Meng |
| John Enos | Old Cop |
| James DuMont | MEMA Director |
| Melanie Blake Roth | Hospital Victim #4 |
| John Fiore | Mike Thomas |
| Adam Trese | Agent Bradshaw |
| James Colby | Billy Evans |
| Dean Neistat | Special Agent Butler |
| Shawn Contois | MIT Officer Reed |
| Billy Smith | Captain Charlie Collins |
| Marinko Radakovic | Police Officer |
| Sean Avery | Watertown Cop #1 |
| Darryl Wooten | Murder Cop #3 |
| Hampton Fluker | Agent Williams |
| Dicky Eklund | Mikey - Young Cop 1 |
| Ian Dylan Hunt | HIG Interrogator |
| Matthew James Kutcher | Officer Miguel Colon |
| Jay Giannone | Jimmy |
| Curtis J. Bellafiore | Officer Joey Reynolds |
| Cliff Moylan | Sergeant John MacLellan |
| Emily Petta | Dr. #2 |
| Paige MacLean | Ofc. Lisa Murphy |
| Rhet Kidd | Harrold |
| Kelby Turner Akin | Dic Donohue |
| Tereza Kacerova | Lilliana Williams |
| Lorna Pruce | Mass State Trooper |
| David DeBeck | Chief Deveau |
| Gregory Schwabe | Negotiator 1 |
| Albert M. Chan | Computer Forensic Tech |
| Martine Assaf | Connie Pugliese |
| Dan Whelton | Jeff Bauman |
| Brandon Scales | FBI Analyst #3 |
| Cory Scott | Harvard Professor/FBI Lecturer |
| Gavin Monteiro | Ecuadorian Family Member |
| Joe Sobalo | Cambridge Cop |
| Ron G. Young | Injured Victim |
| Kathy Harum | Carol's Mom |
| Margaret Buff | Jessica's Mom |
| Elijah Guo | Dias |
| Anthony Romeo Garcia | Bomb Suspect |
| Dustin Tucker | Steve Woolfenden |
| Rick Burtt | Boat Owner |
| Donna MacClary | Boat Owner's Wife |
| James L. Leite | Felix G. Arroyo |
| Kathy-Ann Hart | Secretary |
| Matt Mings | Boston Cop |
| Christopher Wyman | F.B.I. Swat |
| Max McGillivray | FBI Analyst 1 |
| Charles Luise | MSP Colonel |
Technical Credits
| Peter Berg | Director,Original Story,Screenwriter |
| Casey Adams | Stunts |
| Dorothy Aufiero | Producer |
| Dylan Clark | Producer |
| Matt Cook | Original Story,Screenwriter |
| Steve Cooper | Art Director |
| Tom Duffield | Production Designer |
| Eric Johnson | Executive Producer |
| Eric Johnson | Original Story |
| Rob Fitz | Makeup |
| Gabriel Fleming | Editor |
| Louis G. Friedman | Executive Producer |
| Sheila Jaffe | Casting |
| Virginia Johnson | Costumes/Costume Designer |
| Stephen Levinson | Producer |
| Dror Mohar | Sound/Sound Designer |
| Piero Mura | Sound/Sound Designer |
| Nicholas David Nesbitt | Executive Producer |
| Colby Parker | Editor |
| Hutch Parker | Producer |
| Angela Peri | Casting |
| Michael Radutzky | Producer |
| Trent Reznor | Score Composer |
| Atticus Ross | Score Composer |
| Tobias Schliessler | Cinematographer |
| Stephen Stapinski | Associate Producer |
| Scott Stuber | Producer |
| Paul Tamasy | Original Story |
| Johnny Villanueva | Makeup |
| Mark Wahlberg | Producer |
| Daniel Wilson | Executive Producer |
| Josh Zetumer | Screenwriter |
