Dr David Oliver Tonkin AO (20 July 1929 – 2 October 2000) was the 38th Premier of South Australia, from 18 September 1979 to 10 November 1982. He was elected to the South Australian parliament in the 1970 election. He became the state's leader of the Liberal Party in 1975. His party won the state elections in 1979, after Don Dunstan of the Labor Party had resigned as premier.