Robert Lloyd Fish (21 August 1912 – 23 February 1981) was an American writer of crime fiction. His first novel, The Fugitive, gained him the Mystery Writers of America's Edgar Allan Poe Award for best first novel in 1962, and his short story "Moonlight Gardener" was awarded the Edgar for best short story in 1972. His 1963 novel Mute Witness, written under the pseudonym Robert L. Pike, was filmed in 1968 as Bullitt, starring Steve McQueen.