Aurora—Oak Ridges—Richmond Hill

Aurora—Oak Ridges—Richmond Hill stretches across the suburban heart of York Region, taking in the southern portion of the Town of Aurora and the northern neighbourhoods of Richmond Hill. The riding sits atop the Oak Ridges Moraine, a geologically significant landform that functions as a major groundwater recharge zone for southern Ontario, and includes landmarks such as Lake Wilcox and the historic David Dunlap Observatory lands.

Candidates

Leona Alleslev (Conservative) — The incumbent MP, Alleslev was first elected as a Liberal in 2015 before crossing the floor to the Conservative Party in September 2018, citing concerns over the government's handling of economic and foreign policy. A graduate of the Royal Military College of Canada, she served as a logistics officer in the Royal Canadian Air Force before holding management positions at IBM and Bombardier Aerospace.

Leah Taylor Roy (Liberal) — Born in Newmarket, Taylor Roy held a Bachelor of Commerce from the University of Toronto and a Master of Public Policy from Harvard University. She brought private-sector experience from roles at the World Bank and McKinsey & Company, and later ran a family-owned green-energy business before seeking the Liberal nomination.

Aaron Brown (NDP) — A University of Toronto student studying international development, Brown was among the youngest candidates on the ballot in the riding. He campaigned on expanding public healthcare coverage to include dental, eye, and mental health services.

Timothy Flemming (Green Party) — Flemming carried the Green Party banner in Aurora—Oak Ridges—Richmond Hill, advocating for environmental protections in the riding's moraine-adjacent communities.

Priya Patil (People's Party) and Serge Korovitsyn (Libertarian) also sought election in the riding.

About the Riding

Aurora—Oak Ridges—Richmond Hill is a commuter-oriented constituency where many residents travel south along Highway 404 and Yonge Street to workplaces in Toronto. The riding's population is heavily suburban, with newer residential developments spreading across former agricultural land over the preceding two decades. The local economy leaned toward professional services, technology, and small business, with Southlake Regional Health Centre in nearby Newmarket serving as a major regional employer. Transit connectivity was a persistent concern, as residents relied on GO Transit's Barrie and Richmond Hill lines for commutes to Toronto, and the long-discussed Richmond Hill extension of the Yonge subway line remained unfunded at the federal level. Environmental stewardship of the Oak Ridges Moraine was a recurring campaign theme, with ongoing tensions between residential development pressure and the protections established under provincial legislation. The contest drew particular attention because of Alleslev's high-profile floor crossing the previous year, making the riding a bellwether for whether voters would endorse or punish the move.