South Australia 2026 state election: One Nation’s historic gains and Liberal Party’s decline
Consensus Summary
The South Australian state election on March 21, 2026, marked a historic shift in Australian politics with One Nation’s unprecedented gains and the Liberal Party’s devastating collapse. Labor secured a landslide victory, winning at least 32 of 47 lower house seats, while One Nation won its first lower house seat outside Queensland in Ngadjuri, with projections indicating potential wins in Hammond and MacKillop. One Nation’s primary vote surged to approximately 21-24%, surpassing the Liberals, whose primary vote plummeted to around 16-19%, leaving them with only 4-8 lower house seats. The election exposed deep voter dissatisfaction with the major parties, as One Nation capitalized on grievances over immigration, housing, and economic issues, particularly in regional and working-class areas. Early voting set a record with over 400,000 votes, reflecting heightened political engagement. The Liberal Party’s leadership under Ashton Hurn, installed just months before the election, faced widespread criticism for its disarray and scandals, including leadership instability and internal factional disputes. One Nation’s success was further bolstered by the Liberals’ decision to preference One Nation above Labor, which complicated preference flows and handed seats to the populist party. Meanwhile, Labor’s strong performance was attributed to Premier Peter Malinauskas’ popularity and effective campaigning, though the party also faced challenges in traditionally safe seats due to One Nation’s surge. The election underscored a broader trend of voter disillusionment with mainstream politics, with One Nation’s rise signaling a potential realignment of Australia’s political landscape, particularly ahead of upcoming federal and state elections.
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Key details reported by multiple sources:
- South Australian state election held on March 21, 2026, with polls closing at 6pm AEST
- Peter Malinauskas and Labor Party secured a landslide victory, winning at least 32 of 47 lower house seats
- One Nation won its first-ever lower house seat outside Queensland in the Ngadjuri electorate, with David Paton declared the winner
- One Nation’s primary vote reached approximately 21-24% statewide, surpassing the Liberal Party’s 16-19% primary vote
- Liberal Party’s primary vote collapsed to around 16-19%, down from 36% in the 2022 election, with only 4-8 lower house seats projected
- Ashton Hurn became Liberal Party leader in December 2025, leading the party into the election with record-low support
- Early voting in SA exceeded 400,000 votes, a record and more than double the 2022 early vote total of 212,466
- One Nation’s SA leader is Cory Bernardi, who is projected to win an upper house seat
- Pauline Hanson’s One Nation party ran open tickets on how-to-vote cards, complicating preference flows
- One Nation’s primary vote surged in outer Adelaide suburbs, with significant gains in working-class areas traditionally held by Labor
- Labor’s primary vote was around 35-40%, with a minor swing against the party (2-4%)
- One Nation’s candidate Aoi Baxter was disendorsed on election day due to a UK arrest warrant for failing to attend court on a sexual touching charge
- The SA election was the first under new electoral laws banning private donations to political parties
- One Nation’s primary vote in the 2022 SA election was 2.6% statewide, with 6.6% in contested seats
Points of Difference
Details reported by only one source:
- Barnaby Joyce called One Nation’s SA result a ‘seismic shift’ and attributed it to ‘clarity, unity, and strength’ in the party’s message
- Peter Malinauskas recited Henry Lawson’s poem ‘The Duty of Australians’ in his victory speech, emphasizing a ‘subdued form of patriotism’
- DemosAU poll projected One Nation could win 46-55 federal seats if an election were held, with Labor retaining a reduced majority of 77-86 seats
- One Nation’s primary vote in DemosAU poll was 27%, up 10 points from October-November 2025
- Former Nationals leader David Littleproud stated One Nation’s rise was due to a ‘vacuum’ left by the Coalition’s scrapped policies after the 2025 federal election
- ABC projected One Nation to win Ngadjuri, Hammond, and MacKillop lower house seats, with Narungga also in contention
- One Nation candidate Chantelle Thomas had a ‘strong chance’ of winning Narungga, according to ABC
- ABC reported One Nation’s primary vote was ‘just shy of 23%’ in some regional areas
- ABC’s live coverage included voter testimonials like Trevor Wilson, a pensioner who voted One Nation as a ‘protest’ against Labor and Liberals
- ABC noted One Nation’s strength in rural areas like Flinders and Hammond, where Liberal incumbents faced significant swings
- ABC reported One Nation’s primary vote in Elizabeth seat was 32%, with a 23% swing in its favor
- ABC’s Casey Briggs stated Labor’s primary vote was ‘continuing to pick up seats’ in the count
- Guardian reported One Nation was ahead in four lower house seats (Ngadjuri, Hammond, Narungga, MacKillop) and in contention in two others (Stuart, Light)
- Guardian’s poll showed One Nation’s primary vote at 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian noted One Nation’s success in regional seats like Chaffey and Hammond, where it threatened to flip Liberal-held seats
- Guardian’s analysis highlighted One Nation’s gains in working-class suburban seats like Elizabeth and Kaurna
- Guardian reported Pauline Hanson’s SA campaign included a plane operated by Gina Rinehart’s company, which Bernardi claimed was not an in-kind donation
- Guardian’s Jill Sheppard stated One Nation’s support was highest in Barker, Grey, and Spence federal electorates
- Guardian’s Clem Macintyre mentioned potential One Nation gains in rural seats like Finniss and Kavel, where independents or Liberal incumbents faced challenges
- The Age reported One Nation’s primary vote spiked to nearly 24%, with Liberals at 19% at 8.30pm AEST
- The Age highlighted One Nation’s candidate Aoi Baxter’s disendorsement due to a UK arrest warrant, calling it a ‘critical moment’ for the party
- The Age noted One Nation’s strength in rural areas like Hammond and Ngadjuri, with significant swings against the Liberals
- The Age reported Labor’s primary vote was 35%, with a 4% swing against the party
- The Age mentioned One Nation’s primary vote in the 2022 SA election was 2.6% statewide, with 6.6% in contested seats
- SMH reported One Nation’s primary vote was 24%, with Liberals at 19%, and Labor at 35% with a 4% swing against it
- SMH noted One Nation’s strength in working-class areas like Elizabeth, where it recorded a 26.4% primary vote swing
- SMH reported One Nation’s candidate disendorsement controversy involving Aoi Baxter, who was barred from One Nation’s post-election function by ABC
- SMH stated One Nation’s primary vote in Elizabeth was 26.4%, with a 15% swing against Labor and 20% swing against Liberals
- Guardian’s Josephine Tovey and Sarah Martin discussed One Nation’s appeal to voters frustrated with major parties, citing grievance politics
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s Tony Barry argued One Nation’s surge was a warning that ‘fiddling at the edges’ was no longer enough for major parties
- Guardian reported One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis highlighted One Nation’s gains in rural seats like Chaffey and Hammond, threatening Liberal dominance
- Guardian noted One Nation’s success in working-class suburban seats like Elizabeth and Kaurna
- Guardian’s analysis suggested One Nation’s success was due to a ‘short-term re-alignment’ in Australian elections, with voters frustrated by ‘mediocre governments’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘legitimate sense of lost opportunity’ on housing and economic issues
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
- Guardian’s analysis suggested One Nation’s success was due to a ‘deep distrust and discontent with the political establishment’
- Guardian’s analysis stated One Nation’s primary vote was 21.1% with 30% of votes counted, ahead of Liberals at 19%
Contradictions
Conflicting information between sources:
- The Guardian reported One Nation was ahead in four lower house seats (Ngadjuri, Hammond, Narungga, MacKillop) and in contention in two others, while ABC initially projected One Nation to win Ngadjuri, Hammond, and MacKillop but later noted Narungga was also in contention
- The Guardian reported One Nation’s primary vote at 21.1% with 30% of votes counted, while ABC stated One Nation’s primary vote was ‘just shy of 23%’ in some regional areas
- The Guardian reported One Nation’s primary vote was 21.1% with 30% of votes counted, while DemosAU’s poll projected One Nation’s primary vote at 27% statewide
- The Guardian reported One Nation was leading in four lower house seats, while ABC initially projected One Nation to win only three lower house seats (Ngadjuri, Hammond, MacKillop) and Narungga as in contention
- The Guardian reported One Nation’s primary vote was 21.1% with 30% of votes counted, while SMH reported One Nation’s primary vote was 24% statewide
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