Senator Larissa Waters has been announced as the new leader of the Greens.
Adam Bandt, who had led the minor party since 2020, lost his seat of Melbourne, ending his 15-year career in federal parliament.
His colleagues met in the Victorian capital on Thursday to decide on a new leader.
Queensland senator Larissa Waters triumphed over South n Sarah Hanson-Young and Mehreen Faruqi from NSW.
Senator Waters, who has been in parliament since 2011, was considered by many to be a reluctant candidate.
She now faces the task of picking up the pieces after the Greens lost three lower house seats and failed to pick up any extras at the election.
However, they remain confident of wielding influence in the Senate, where the party holds the balance of power.
The Greens are left with the Queensland seat of Ryan and 11 senators following the election.
Labor has at least 28 seats in the Senate and with the support of the Greens has the numbers to get legislation through the upper house.
More to come.