William Colin Winfrey (May 9, 1916 – April 14, 1994) was an American Hall of Fame Thoroughbred racehorse trainer. Bill Winfrey was born Colin Dickard. His father died when he was three, and two years later his mother married Hall-of-Fame trainer G. Carey Winfrey. He was officially adopted and took Winfrey's last name. At age 15, he became a jockey, but weight gain forced him to turn to training. In 1932, he became the youngest licensed trainer in the United States. His career was interrupted by service with the United States Marine Corps during World War II. He retired after the 1969 season, but returned to training for two more years in 1977 and 1978. During his career, Bill Winfrey trained 38 stakes winners, including seven champions, of which three were inducted in the U. S. Racing Hall