The 2025 Werribee state by-election was held on 8 February 2025 to elect the member for Werribee in the Victorian Legislative Assembly, following the resignation of Labor MP Tim Pallas. It took place on the same day as a by-election for Prahran.
On 19 February 2026, the Victorian Electoral Commission (VEC) declared Labor candidate John Lister as the winner of the by-election by 0.82% or 693 votes.
Werribee is located in the rapidly growing outer south west suburbs of Melbourne, covering the suburbs of Werribee, Wyndham Vale, and the rural areas surrounding these suburbs to the south and west. The seat, along with the electoral districts of Tarneit and Lara which covered the seat's area between 2002 and 2014, has been continuously held by Labor since 1979.
At the time of the 2021 Australian census, the seat had a median weekly personal income of $784, lower than the state ($803) and national ($805) averages. Less than a quarter of residents hold a bachelor's degree or higher (24.1%), a figure lower than the state (29.2%) and national (26.3%) figures, and the median age of residents (34) is slightly younger than both the state and national rates (38).
Candidates are listed in the order they appeared on the ballot.
Labor announced on 23 December 2024 that John Lister, a local school teacher and Country Fire Authority (CFA) volunteer firefighter, would be its candidate for the by-election.
On 22 December 2024, the Liberal Party publicly confirmed that they indicated to contest the by-election. On 11 January 2025, the party announced its candidate would be Steve Murphy, a real estate agent and former police officer who resides in Essendon West.
The Victorian Greens announced on 10 January 2025 that Rifai A. Raheem, a community activist and union organiser, would be its candidate.
Candidates can provide how-to-vote cards with recommendations for voters on how to preference other parties. Kodei Mulcahy and Paul Hopper did not recommend any preferences, while Aidan McLindon only suggested preferencing Hopper second. Additionally, the Victorian Trades Hall Council registered a how-to-vote card, calling for Liberal candidate Steve Murphy to be preferenced last.