2025 Prahran state by-election

The 2025 Prahran state by-election was held on 8 February 2025 to elect the member for Prahran in the Victorian Legislative Assembly, following the resignation of incumbent MP Sam Hibbins, who had held the seat for the Victorian Greens since the 2014 election. The poll took place on the same day as a by-election for Werribee.

Hibbins resigned from the Greens on 1 November 2024, after it emerged that he had engaged in an extramarital affair with a staff member from his office, which he described as a "human mistake". He moved to the crossbench and sat as an independent until delivering his resignation as a member of parliament on 23 November 2024.

The by-election was won by Liberal candidate Rachel Westaway with a two-candidate-preferred vote swing of 13.6% against the Greens. Greens leader Ellen Sandell conceded defeat the day after the by-election, blaming the loss on preference flows and the by-election's timing.