John Wayne as Reuben J. "Rooster" Cogburn

Kim Darby as Mattie Ross

Glen Campbell as "La Boeuf"

Jeremy Slate as Emmett Quincy

Robert Duvall as Ned Pepper

Dennis Hopper as "Moon"

Alfred Ryder as Goudy

Strother Martin as Colonel G. Stonehill

Jeff Corey as Tom Chaney

Ron Soble as Captain Boots Finch

James Westerfield as Judge Parker

John Fiedler as Lawyer Daggett

John Doucette as "Sheriff"

Donald Woods as "Barlow"

Edith Atwater as Mrs. Floyd

Carlos Rivas as "Dirty Bob"

Isabel Boniface as Mrs. Bagby

H.W. Gim as Chen Lee

John Pickard as Frank Ross

Elizabeth Harrower as Mrs. Ross

Ken Renard as Yarnell

Jay Ripley as Harold Parmalee

Kenneth Becker as Farrell Parmalee

Wilford Brimley as Minor Role (uncredited)

Chuck Hayward as Card Player / Raft Man (uncredited)

Leon Alton as Boarding House Guest (uncredited)

Forrest Burns as Courtroom Spectator (uncredited)

Albert Cavens as Boarding House Guest (uncredited)

Gene Coogan as Boarding House Guest (uncredited)

Myron Healey as Deputy at Prisoner Unloading (uncredited)

James McEachin as Judge Parker's Bailiff (uncredited)

Dennis McMullen as Bailiff (uncredited)

Boyd 'Red' Morgan as Red - Ferryman (uncredited)

Robin Morse as Bit Part (uncredited)

Edna O'Dell as Boarding House Guest (uncredited)

John Pedrini as Boarding House Guest (uncredited)

General Sterling Price as Ginger Cat (uncredited)

Stuart Randall as McAlester (uncredited)

Clark Ross as Courtroom Spectator (uncredited)

Connie Sawyer as Talkative Woman at Hanging (uncredited)

Jeffrey Sayre as Courtroom Spectator (uncredited)

Jay Silverheels as Condemned Man at Hanging (uncredited)

Dean Smith as Minor Role (uncredited)

Vincent St. Cyr as Gaspargoo (uncredited)

Max Wagner as Courtroom Spectator (uncredited)

Guy Wilkerson as The Hangman (uncredited)

Chalky Williams as Courtroom Spectator (uncredited)

Hank Worden as R. Ryan - Undertaker (uncredited)