Lord Murphy (1876 – after 1881) was an American thoroughbred racehorse that was bred in Tennessee and is best known for winning the 1879 Kentucky Derby. He was originally named Patmus and was a grandson of Lexington. He descended from the Byerly Turk. The 5th Kentucky Derby was run on a fast track with a field of nine horses, including the notable racer and future leading sire Falsetto. Lord Murphy was knocked almost to his knees by Ada Glenn on the first turn, but managed to pull himself up from 7th to 1st place at the mile marker to win over the fast approaching Falsetto.