Gary Cooper as Marshal Will Kane

Thomas Mitchell as Mayor Jonas Henderson

Lloyd Bridges as Deputy Marshal Harvey Pell

Grace Kelly as Amy Fowler Kane

Katy Jurado as Helen Ramírez

Otto Kruger as Judge Percy Mettrick

Lon Chaney Jr. as Martin Howe

Harry Morgan as Sam Fuller

Ian MacDonald as Frank Miller

Eve McVeagh as Mildred Fuller

Morgan Farley as Dr. Mahin, minister

Harry Shannon as Cooper

Lee Van Cleef as Jack Colby

Robert J. Wilke as Jim Pierce

Sheb Wooley as Ben Miller

Jack Elam as Charlie - Drunk in Jail (uncredited)

John Doucette as Trumbull (uncredited)

Ted Stanhope as Station Master (uncredited)

Lee Aaker as Boy (uncredited)

Guy Beach as Fred - Coffinmaker (uncredited)

Larry J. Blake as Gillis - Saloon Owner (uncredited)

John Breen as Church Member (uncredited)

Tex Driscoll as Church Member (uncredited)

Herschel Graham as Church Member (uncredited)

Paul Kruger as Church Member (uncredited)

William H. O'Brien as Church Member (uncredited)

Roy Bucko as Barfly (uncredited)

Russell Custer as Barfly (uncredited)

Nora Bush as Townswoman (uncredited)

Ann Kunde as Townswoman (uncredited)

Ben Corbett as Townsman (uncredited)

Rudy Germane as Townsman (uncredited)

Chuck Hayward as Townsman (uncredited)

Michael Jeffers as Townsman (uncredited)

Kansas Moehring as Townsman (uncredited)

Jack Montgomery as Townsman (uncredited)

Buddy Roosevelt as Townsman (uncredited)

Allen D. Sewall as Townsman (uncredited)

Howland Chamberlain as Hotel Clerk (uncredited)

Virginia Christine as Mrs. Simpson (uncredited)

Cliff Clark as Ed Weaver (uncredited)

Paul Dubov as Scott (uncredited)

Dick Elliott as Kibbee (uncredited)

Virginia Farmer as Mrs. Fletcher (uncredited)

Tim Graham as Sawyer (uncredited)

Tom Greenway as Ezra (uncredited)

Harry Harvey as Coy (uncredited)

Nolan Leary as Lewis (uncredited)

Tom London as Sam (uncredited)

Merrill McCormick as Fletcher (uncredited)

William Newell as Jimmy - Drunk with Eye Patch (uncredited)

James Millican as Deputy Sheriff Herb Baker (uncredited)

William Phillips as Barber (uncredited)

Lucien Prival as Joe - Ramirez Saloon Bartender (uncredited)

Ralph Reed as Johnny - Town Boy (uncredited)

Charles Soldani as Indian Outside of Saloon (uncredited)

Slim Talbot as Barbershop Customer (uncredited)