Rio Rattler is a 1935 American Western film directed by Bernard B. Ray.

A dying Marshal gives his identification papers to Tom. After Tom arrives in town, the papers drop and are found during a fight so Tom decides to assume the Marshal's identity. Mason, the chief, now sends Rattler, the killer of the Marshal, to also kill Tom. But when he overhears Tom is a fake, they change their plans and now go to arrest Tom for the murder of the Marshal.

• Tom Tyler as Tom Denton
• Eddie Gribbon as Soapy
• Marion Shilling as Mary Adams
• William Gould as Banker Mason
• Tom London as Ranger Bob Adams
• Slim Whitaker as "Rattler" Brown
• Lafe McKee as "Pop" - Hotel owner
• Ace Cain as Henchman Sam Hall
• Frank Ellis as Tonto (Man owing Pop $25)

• Rio Rattler at IMDb
• Rio Rattler is available for free viewing and download at the Internet Archive