Kenneth Sandilands "Sandy" Duncan OBE (26 April 1912 – 18 June 2005) was an English athlete who competed in the 1934 British Empire Games and in the 1938 British Empire Games. He later became one of the most distinguished and sympathetic sports officials of his generation, as the long-serving general secretary of the British Olympic Association. For many years he was synonymous with the Olympic movement in Britain.