| Bradley Cooper | .... | Chris Kyle |
| Kyle Gallner | .... | Goat-Winston |
| Cole Konis | .... | Young Chris Kyle |
| Ben Reed | .... | Wayne Kyle |
| Elise Robertson | .... | Deby Kyle |
| Luke Sunshine | .... | Young Jeff Kyle |
| Troy Vincent | .... | Pastor |
| Brandon Salgado-Telis | .... | Bully |
| Keir O'Donnell | .... | Jeff Kyle |
| Marnette Patterson | .... | Sarah |
| Jason Hall | .... | Cowboy |
| Billy Miller | .... | Navy Recruiter |
| Leonard Roberts | .... | Instructor Rolle |
| Jason Walsh | .... | Instructor #2 |
| Rey Gallegos | .... | Tony |
| Kevin Lacz | .... | Dauber |
| Jake McDorman | .... | Biggles |
| Cory Hardrict | .... | 'D' / Dandridge |
| Eric Ladin | .... | 'Squirrel' / Case |
| Sienna Miller | .... | Taya |
| Brando Eaton | .... | Dapper Navy Man |
| James Ryen | .... | PO Karnan |
| Luke Grimes | .... | Marc Lee |
| Jonathan Kowalsky | .... | 1st Marine #2 |
| Shane M Habberstad | .... | 1st Marine #1 |
| Sammy Sheik | .... | Mustafa |
| Kevin Ryan | .... | Marine Viper #4 |
| Evan Gamble | .... | JAG Officer #1 |
| Benjamin Mathes | .... | JAG Officer #2 |
| Tim Griffin | .... | Colonel Gronski |
| Luis Jose Lopez | .... | Sanchez |
| Brian Hallisay | .... | Capt. Gillespie |
| Erik Aude | .... | Thompson |
| Jad Mhidi Senhaji | .... | Omar |
| Navid Negahban | .... | Sheikh Al-Obodi |
| Fehd Benchemsi | .... | Terp #1 |
| Eric Close | .... | DIA Agent Snead |
| Zack Duhame | .... | Contractor |
| Mido Hamada | .... | The Butcher |
| Kathe Mazur | .... | Dr. Hallerman |
| Sam Jaeger | .... | Navy Seal Lt. Martin |
| Chance Kelly | .... | Lt. Col. Jones |
| Ryan Sadaghiani | .... | Son |
| Ayman Samman | .... | Father |
| Assaf Cohen | .... | Terp #2 |
| Fahim Fazli | .... | Messianic Tribal Leader |
| Salah Salea | .... | Angry Neighbor |
| Hector Bucio | .... | PFC Alvarez |
| Aidan McGraw | .... | Young Colton |
| Jonathan Groff | .... | Young Vet-Mads |
| Melissa Hayden | .... | Receptionist |
| Ferguson Reid | .... | Navy Doctor |
| Mark Thomason | .... | Chaplain |
| Pamela Denise Weaver | .... | Marc Lee's Mom |
| Amie Farrell | .... | Marc Lee's Wife |
| Quay Terry | .... | Firing Party NCO |
| James D. Dever | .... | Funeral Detail OIC |
| Tami Goveia | .... | Navy Nurse |
| Leon Charles Farmer | .... | Marine Gate Guard #1 |
| Paul Meixner | .... | Marine Gate Guard #2 |
| Victoria Reina Sigloch | .... | Marine Gate Guard #3 |
| Joel Lambert | .... | Delta Sniper |
| Owain Yeoman | .... | Ranger One |
| Tony Nevada | .... | Recon Sniper |
| Brett Edwards | .... | Recon Gunner |
| Nick Salter | .... | Navy Dispatch Officer |
| Ricky Ryba | .... | Cobra Pilot |
| Greg Duke | .... | MRAP Gunner |
| Max Charles | .... | Colton |
| Jet Jurgensmeyer | .... | Colton's Friend |
| Madeleine McGraw | .... | McKenna |
| Elizabeth Schmidt | .... | Boy's Mom |
| Robert Clotworthy | .... | VA Doctor |
| Bryan Anderson | .... | Wynn's Friend |
| Jacob Schick | .... | Wynn |
| Wade White | .... | Veteran #1 |
| Anthony Jennings | .... | Veteran #2 |
| Vincent Selhorst-Jones | .... | Veteran at Truck |
| Brad Abrell | .... | September 11th Newscaster (uncredited, voice) |
| Zechariah Adeniji | .... | Cobra Striker (uncredited) |
| Robert Aldredge | .... | Sniper School Cadet (uncredited) |
| Amber Alexander | .... | Drinking Buddy (uncredited) |
| Belle Angel | .... | Doctor (uncredited) |
| Shaun Anthony | .... | Marine Viper (uncredited) |
| Ethan C. Avery | .... | U.S. Marine (uncredited) |
| Christopher Baskerville | .... | Home Coming Father (uncredited) |
| Sarah Beaver | .... | Soldiers Family (uncredited) |
| Emerson Brooks | .... | Marine Sniper (uncredited) |
| Rowdy Brown | .... | Bull Rider (uncredited) |
| Saraya Chanadet | .... | Girl On Jungle Gym (uncredited) |
| Ryan Christiansen | .... | Cop #2 (uncredited) |
| Damien Coates | .... | U.S Marine (uncredited) |
| Darius Cottrell | .... | Ranger Gunner #1 (uncredited) |
| Alvin Cowan | .... | Marine LT Dever (uncredited) |
| Martin Cremer | .... | Navy SEAL Sniper School Candidate (uncredited) |
| Alysson Da Silva | .... | Navy Seal (uncredited) |
| Jason Darcy | .... | Humvee Tank Soldier (uncredited) |
| Mark DeSalvo | .... | Col Driver-Marine (uncredited) |
| Andrew DeVitre | .... | Angry Neighbor (uncredited) |
| Savannah Douglas | .... | Playground Child (uncredited) |
| Talyn Edelson | .... | Rodeo Cowgirl (uncredited) |
| Golbon Eghtedari | .... | The Shadow (uncredited) |
| Dirk Ellis | .... | Marine (uncredited) |
| Tony Flores | .... | Insurgent (uncredited) |
| Brandon Greenawalt | .... | Navy Seal Officer (uncredited) |
| Brent Gutierrez | .... | Car Jacker (uncredited) |
| Adam Hart | .... | Jeff 'Marine' (uncredited) |
| Boualem Hassaine | .... | Insurgent (uncredited) |
| Tom Ivancie | .... | Bartender (uncredited) |
| Alissa Jessup | .... | Female Driver (uncredited) |
| Slim Khezri | .... | Insurgent (uncredited) |
| Noëlle Lara | .... | Bar Waitress (uncredited) |
| Anthony Ledesma | .... | Insurgent (uncredited) |
| Serendipity Lilliana | .... | Colton's Friend (uncredited) |
| Marque Lundgren | .... | Carnival Game Operator (uncredited) |
| Hunter Mahaffey | .... | Colton's Friend (uncredited) |
| Jon Maxwell | .... | American Hostage (uncredited) |
| Ryan Mazon | .... | 21 Gun Salute Sailor #1 (uncredited) |
| Katie Meschke | .... | Wedding Guest (uncredited) |
| Mykell | .... | Private Gukeisen (uncredited) |
| Joseph Oliveira | .... | Insurgent (uncredited) |
| Angel Oquendo | .... | (uncredited, voice) |
| Katia Peel | .... | Little Boy (uncredited, voice) |
| Cristal Peshkepia | .... | Woman at Airport (uncredited) |
| Geoff Pilkington | .... | Marine (uncredited) |
| Haley Powell | .... | Kid (uncredited, voice) |
| Michael Prather | .... | Family Member (uncredited) |
| Ardeshir Radpour | .... | Insurgent (uncredited) |
| Jon Ray | .... | Black Hat Cowboy (uncredited) |
| Cliff Redding | .... | Homecoming Family Member (uncredited) |
| Will Rian | .... | Major Porter (uncredited) |
| Paulo Rocha | .... | Marine Radio Operator (uncredited) |
| Richard Rubin | .... | Navy Seal (uncredited) |
| E. R. Ruiz | .... | Carjacker #2 (uncredited) |
| Jane Runnalls | .... | Jiffy Lube Customer (uncredited) |
| Kevin Ryan | .... | Marine (uncredited) |
| Amanda Sackett | .... | Maid of Honor (uncredited) |
| Hassan Said | .... | Butcher Guard (uncredited) |
| Shane Schoeppner | .... | Man at Airport (uncredited) |
| Joseph Sims | .... | Rodeo Attendee (uncredited) |
| Andy Skauge | .... | Rodeo Attendee (uncredited) |
| Noah Staggs | .... | Rodeo Patron (uncredited) |
| Katherine Stephens-Miller | .... | Relative of Navy SEAL (uncredited) |
| Tim Talman | .... | Cop #1 (uncredited) |
| Danny Watters | .... | Marine (uncredited) |
| Dean Wayne | .... | U.S. Marine (uncredited) |
| Westley Young | .... | U.S. Marine (uncredited) |