South Australia’s 2026 state election: One Nation’s surge and parliamentary impact

Consensus Summary

South Australia’s 2026 state election delivered a historic surge for Pauline Hanson’s One Nation, which secured 22.3% of the primary vote—nine times its 2022 result—and won its second lower house seat outside Queensland in Hammond (Robert Roylance) and confirmed Ngadjuri (David Paton). Despite this, One Nation’s vote was geographically dispersed, limiting its seat tally to four in the lower house (with Narungga and MacKillop still unresolved) and three in the Legislative Council. Labor won decisively with 33 seats, while Liberals retained official opposition status with four to six seats. The election exposed One Nation’s appeal as a protest vote against major parties, fueled by economic anxiety over rising petrol prices and housing costs. Analysts warn the party’s growth could threaten Labor in Victoria’s November election and the Farrer federal byelection, while Liberals face internal divisions over how to counter One Nation’s rise. The Guardian and ABC highlight preference flows as critical to One Nation’s wins, noting Liberals’ strategic preference deals boosted the party’s chances. Meanwhile, The Age links the election to broader global instability, including the Iran war’s oil shock, which may deepen voter discontent. Contradictions arise in seat counts and vote percentages, but all sources agree on One Nation’s unprecedented electoral breakthrough in a traditionally moderate state.