Roger L. Attfield (born 28 November 1939 in Newbury, Berkshire, England) is a Canadian thoroughbred horse trainer and owner and an inductee of both the Canadian and United States horseracing Halls of Fame. In 1999, Roger Attfield was inducted into the Canadian Horse Racing Hall of Fame and in 2006, he was nominated for induction into the U.S. National Museum of Racing and Hall of Fame. In 2012, Roger Attfield was inducted into the National Museum of Racing and Hall of Fame In 2012, Roger Attfield was inducted into the Ontario Sports Hall of Fame.