Roger Sherman Hoar (April 8, 1887 – October 10, 1963) was a state senator and assistant Attorney General, state of Massachusetts. He also wrote science fiction under the pseudonym of “Ralph Milne Farley”.

Under the pseudonym Ralph Milne Farley, Hoar wrote a considerable amount of pulp-magazine science fiction during the period between the world wars, appearing in such publications as Argosy All-Story Weekly, Weird Tales, True Gang Life, and Amazing Stories, as well as occasional essays for The American Mercury, Scientific American, and science fiction fanzines. His works include The Radio Man and its numerous sequels, chiefly interplanetary and inner-world adventure yarns in the tradition of Edgar Rice Burroughs, with whom he was friends; Hoar also wrote a number of archetypal time-travel-paradox tales, collected in book form as The Omnibus of Time, and “The House of Ecstasy,” told in the second-person and frequently reprinted since its initial appearance in Weird Tales (April 1938 issue).