Steven Marshall has been returned as opposition leader in South Australia after the Liberals’ loss at the March 15 state election.

Mr Marshall was unopposed at a party room meeting on Thursday with his deputy Vickie Chapman also returned unopposed.

Mr Marshall said the Liberals would conduct a review of the unsuccessful election campaign.

“We’ll do the analysis. We’ll see what we could have done better,” he told ABC radio.

The opposition picked up three seats from Labor and one from an independent but that was short of the six it needed to form a majority government.

After several days of negotiations Labor was returned when independent Geoff Brock decided to support the party to form a minority administration.