Andrew Jackson "Jack" Joyner (August 4, 1861 – September 1, 1943) was an American Thoroughbred horse racing Hall of Fame trainer and owner.

A. Haggin, Sydney Paget, and for Harry Payne Whitney and August Belmont Jr. whose horses he raced in England including Whisk Broom II.

[5] Jack Joyner worked in England from the time the racing season opened on March 23, 1909 [6] until November 1915 when he returned to the United States [7] and began a twenty-five-year association as trainer for stable owner George D. Widener Jr. During his career, Jack Joyner trained five Champions:[1] Jack Joyner died on September 1, 1943, at age eighty-two at George Widener's Erdenheim Stud at Chestnut Hill, Pennsylvania.

[8] Following its creation, he was part of the inaugural class inducted in the National Museum of Racing and Hall of Fame in 1955.

For a time, Keeneland Race Course in Lexington, Kentucky, ran the A. J. Joyner Handicap, a six furlong event that notably was won by Whirlaway in 1941.