John Joseph "Johnny" Kelley was an American long-distance runner who won the 1957 Boston Marathon and the marathon at the 1959 Pan American Games. He was also a member of the United States Olympic teams of 1956 and 1960, competing in the marathon. He was often dubbed "Kelley the Younger" to avoid confusion with Johnny Kelley, winner of the 1935 and 1945 Boston Marathons; the two men were not related.