Marshal of Cedar Rock is a 1953 American Western film directed by Harry Keller and starring Allan Lane, Phyllis Coates and Eddy Waller.

In Cedar Rock, rancher Nugget Clark wants niece Martha to be nicer to banker Henry Mason, though she is still sweet on Anderson, whom she believes is innocent.

Nugget won't sell because he thinks the railroad will come to Cedar Creek and he will then get a lot more for his land.

Bill is arrested by the sheriff but on the way to jail, Mason's gang arrives and starts shooting up the town.

In the confusion Bill escapes, and the horses pulling Martha's buckboard stampede, but she is saved by Rocky.

Mason has one of his men, Paul Jackson, pose as Harper, who is to try and convince the ranchers that they will be better off selling to the land company.

Mason also sends some of the gang after Bill and tells them that if they get a chance to get rid of Rocky too as he thinks he may know too much.

He return's to the Clark's and tells them he is a US Marshall and now thinks Bill is innocent and that Mason is behind the robberies, but he needs more proof.

When Nugget says he has to accept the land company offer, Bill bursts in and says Harper is a phony but Mason disarms him.

Eventually "Harper" admits he's a fake and says it was Mason's idea and that he has sent men to kidnap the Clarks and force Nugget to sign the deal for the ranches.