John "Jack" Edward Powell Dunn (March 28, 1917 – July 16, 1938) was a British figure skater who competed in the 1930s. His best finish was a silver medal at the 1935 World Figure Skating Championships.

Dunn was a close friend and lover of Sonja Henie, who was training in London towards the end of her competitive career. Following Henie`s victory at the 1936 Winter Olympics, where Dunn placed sixth in the singles event, he accompanied the Henie family to the United States and became her professional skating partner in her touring ice show for the next two years. Their relationship ended when Henie became involved with Tyrone Power. Shortly afterward, in 1938, Dunn died from tularemia contracted from handling a rabbit while on a hunting trip in Texas. He died in Hollywood.