Murray-Mallee was an electoral district of the House of Assembly in the Australian state of South Australia from 1985 to 1993. Murray-Mallee was created in a boundary redistribution in 1985, replacing the Electoral district of Mallee. The last member for Mallee, Peter Lewis, became the first representative for Murray-Mallee in December 1985. Murray-Mallee was abolished in a boundary redistribution in 1993, replaced in part by the Electoral district of Ridley. The member for Murray-Mallee, Peter Lewis, went on to represent Ridley from December 1993.