Reginald James Cushing Sutton (10 May 1909 – 31 July 1994) was an English freestyle swimmer and water polo player who competed for Great Britain in the 1928 Summer Olympics, in the 1932 Summer Olympics, and in the 1936 Summer Olympics. He was born in London. In 1928 he finished sixth with the British team in the 4×200 metre freestyle relay event. In the 100 metre freestyle competition he was eliminated in the first round. He was part of the British water polo team which finished eighth in the 1936 tournament. He played all seven matches.