The Greens are on track to claim at least two seats in Queensland parliament after ejecting former Labor deputy premier Jackie Trad from South Brisbane.
Greens candidate Amy MacMahon claimed victory on Saturday night, with a statewide primary vote for her party of just under 10 per cent as counting continued.
"The Greens have been going out with this really positive vision for the future of Queensland where we can use the state's enormous wealth to fully fund our essential services," she told ABC TV.
"Everyday Queenslanders have responded as you can see. We are so excited about this opportunity to fight for everyday Queenslanders."
Greens policies include 100 per cent publicly owned clean energy and the construction of 100,000 public houses.
"This (result) ends a message to the political establishment that the time where mining corporations are able to dictate to our political system who gets what, is completely over," Ms MacMahon said.
Senior Labor MP Steven Miles, who filled the position of deputy premier after Ms Trad stood down amid controversy, described Saturday's result as "a sad result for Jackie".
"But it is the result of the LNP preferencing the Greens," he said.
The Greens had just a single voice in the previous Queensland parliament, that of Michael Berkman in the seat of Maiwar.
He held a progressive 42 per cent of preliminary votes, ahead of LNP challenger Lauren Day on Saturday night.
Labor Senator Anthony Chisholm noted a general trend of younger voters moving out of the city and boosting the Greens vote in the suburbs.
Australian Associated Press
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