South Australians are casting their ballots in the 2026 state election, with Premier Peter Malinauskas and his Labor government seeking a second term in office. The contest has been dominated by the unexpected surge in support for Pauline Hanson's One Nation party, which has emerged as a significant force in the state's political landscape. Polling stations opened across the state on Saturday morning, with the Electoral Commission of South Australia reporting strong early turnout.
Labor entered election day with opinion polls showing primary vote support between 36 and 39 per cent, while the Liberal opposition under leader Vincent Tarzia has struggled to gain traction, sitting around 32 per cent in most surveys. One Nation's primary vote has climbed to between 12 and 15 per cent in South Australia, a dramatic increase from the 3.4 per cent the party secured at the 2022 state election. The party is also facing allegations of electoral compliance breaches related to its candidate nomination processes, which the Electoral Commission has referred for investigation.
South Australia's political environment has shifted considerably since Labor's comprehensive victory four years ago, when Malinauskas led the party back to power after a single term in opposition. The state has grappled with a housing affordability crisis, rising cost of living pressures, and concerns over health system capacity, issues that One Nation has aggressively campaigned on in outer suburban and regional seats. The minor party's growth mirrors a broader national trend of voter dissatisfaction with the two major parties, echoing patterns seen in Queensland and Western Australia in recent years.
Premier Malinauskas has urged South Australians to judge his government on its delivery record, pointing to investments in hydrogen energy, the new Women's and Children's Hospital, and a reduction in ambulance ramping times. Liberal leader Tarzia has focused his campaign on law and order, promising tougher sentencing and more police officers if elected. One Nation's lead South Australian candidate has dismissed the electoral breach allegations as politically motivated, insisting the party followed all required processes and that any administrative issues were minor in nature.
The result is expected to hinge on preference flows, with One Nation's how-to-vote cards directing preferences away from Labor in key marginal seats across Adelaide's northern and southern suburbs. If Labor secures a second term, Malinauskas is expected to face pressure to address the concerns driving voters toward minor parties, particularly on housing supply and immigration policy. Final results may take several days to confirm, with the Electoral Commission of South Australia noting that a record number of pre-poll and postal votes will need to be counted before seats can be called.