Donald Allan Dunstan AC QC (21 September 1926 – 6 February 1999) was an Australian politician who served as the 35th premier of South Australia from 1967 to 1968, and again from 1970 to 1979. He was a member of the House of Assembly (MHA) for the division of Norwood from 1953 to 1979, and leader of the South Australian Branch of the Australian Labor Party from 1967 to 1979. Before becoming premier, Dunstan served as the 38th attorney-general of South Australia and the treasurer of South Australia. He is the fourth longest serving premier in South Australian history.