Richard Graham Frost (December 29, 1851 – February 1, 1900) was a U.S. Representative from Missouri. Born in St. Louis, Missouri, Frost attended St. John's College, New York City, the University of London, and the St. Louis (Missouri) Law School.He was admitted to the bar and practiced in St. Louis, Missouri.He unsuccessfully contested as a Democrat the election in 1876 of Lyne S. Metcalfe to the Forty-fifth Congress.