John Robert Murdock (April 20, 1885 –February 14, 1972) was a U.S. Representative from Arizona. Born in homestead near Lewistown, Missouri, Murdock attended the public schools.He graduated from State Teachers' College , Kirksville, Missouri, in 1912 and received a bachelors degree at the University of Iowa in 1925. He attended graduate school at the University of Arizona and at the University of California at Berkeley. He was married to Myrtle Cheney Murdock, who popularized the accomplishments of Constantino Brumidi.