Sir William Henry Spooner, KCMG, MM (23 December 1897 – 14 July 1966) was an Australian politician who served as a Senator for New South Wales from 1950 to 1965, representing the Liberal Party. He was a senior minister in the Menzies government, serving as Minister for Social Services from 1949 to 1951 and then Minister for National Development from 1951 to 1964. He was Leader of the Government in the Senate from 1958 to 1964.