Australia's populist right-wing party One Nation has claimed its first-ever seat in the federal House of Representatives, winning the Farrer byelection in regional New South Wales in a result that has sent shockwaves through the country's conservative establishment. One Nation's David Farley defeated independent Michelle Milthorpe, with projections pointing to a final two-party preferred result of roughly 58–42 in Farley's favour. The Liberal Party, which had held the rural inland seat for its entire 76-year history, saw its primary vote collapse by more than 30 percentage points, falling to around 11%. The Nationals, who ran a candidate separately, recorded just under 10%.

The byelection was triggered by the resignation of long-serving Liberal MP Sussan Ley, who had represented Farrer for 25 years before being ousted as Liberal leader in February and replaced by Angus Taylor. One Nation's surge in the seat reflected national polling trends that have placed the party in second place on primary votes behind Labor, ahead of the combined Coalition. In Farrer, Farley recorded a primary vote of around 42%, a rise of 35 percentage points on One Nation's 2025 general election result in the same seat. Labor did not contest the byelection.

One Nation leader Pauline Hanson declared her party was