Sitting Member for Grey, Rowan Ramsey, secured an emphatic victory after receiving strong support in his electorate and the Coalition looking set to form majority government.
As counting progressed on Saturday night, the results coming in from polling booths across the state's largest electorate strongly favoured Mr Ramsey. Mr Ramsey looks set to be able to claim victory on first preferences alone.
Mr Ramsey said he was extremely pleased that the Morrison government had been voted in for another term and thanked those who voted for him.
"I would also like to thank all our loyal supporters who helped get the electoral message out there. It's a massive seat requiring a massive effort," he said.
"I also thank and congratulate the other candidates. It takes courage to put your name forward and then commit to a campaign involving such a large part of the state.
"I compliment them on the civilised way the campaign was conducted."
Mr Ramsey said the strong vote nationally showed a personal endorsement for Scott Morrison.
"Certainly the message I was getting as I travelled the electorate was that people liked his down to earth and honest, practical approach," he said.
Leading up to the election, Mr Ramsey announced a number of electoral commitments, including the start of construction of dual lanes for the Augusta Highway and replacement of the Dog Fence.
He said he would ensure those projects get through their planning stages as quickly as possible and get started.
"It will be an exciting time," he said.
"I have many more projects I want to see move forward like sealing the Strez [Strzelecki Track] and attracting more industry and businesses to Grey to grow jobs."
At Port Augusta polling booths, Mr Ramsey secured 40 per cent of the vote, with Labor on 28 per cent, One Nation on 11 per cent, Centre Alliance on 5.8 per cent, Greens on 5.3 per cent, United Australia Party on 3.8 per cent, Animal Justice Party on 3.1 per cent and independent Richard Carmody on 1.6 per cent. In Quorn, Mr Ramsey had almost 53 per cent of first preference votes, almost 40 per cent in Stirling North, 63 per cent in Hawker and only 26 per cent in Leigh Creek where Labor achieved 33 per cent and the Greens 20 per cent.