Douglas Mostyn Harris (15 June 1919 – 17 June 1996) was a New Zealand runner who competed at the 1948 Olympics and the 1950 British Empire Games.Harris won five New Zealand national athletics titles: the 440 yards in 1945, 1946, and 1947; and the 880 yards in 1946 and 1947.Harris died on 17 June 1996, and he was buried at Hawera Cemetery.