Tiller (foaled 14 April 1974) was an American thoroughbred racehorse. Racing mainly on turf he won sixteen of his forty races between February 1977 and September 1980. He was not a champion, but won many important races and defeated many of the best racehorses of his era including Exceller and John Henry. As a six-year-old he won the Sword Dancer Invitational Handicap and a second Tidal Handicap before he sustained a career-ending injury in September.