Eric Roger Goldsworthy AO (born 17 July 1929) is a former Australian politician and 3rd Deputy Premier of South Australia from 1979 to 1982. Goldsworthy represented the House of Assembly seat of Kavel for the Liberal and Country League and Liberal Party from 1970 to 1992. Before entering Parliament he was a farmer and teacher. He was also a member of University of Adelaide Council 1970–1973. He became deputy leader of the SA Liberals, and hence Deputy Leader of the Opposition, in 1975 when David Tonkin successfully challenged Bruce Eastick's leadership. As such, he became Deputy Premier when the Liberals won the 1979 state election, also serving as Minister of Mines and Energy, Services and Supply. He remained deputy leader when the Liberals went back into opposition in 1982 under John Ols