Stormont--Dundas--Glengarry

Stormont--Dundas--Glengarry occupies the southeastern corner of Ontario, stretching along the north shore of the St. Lawrence River from the Quebec border westward. The riding encompasses the City of Cornwall, the United Counties of Stormont, Dundas, and Glengarry, and a portion of the Mohawk territory of Akwesasne on Cornwall Island. Following the 2022 redistribution, the riding gained the Township of North Glengarry from the former Glengarry--Prescott--Russell, making the 2025 election its first contest under the expanded boundaries. The riding is a blend of the bilingual city of Cornwall, small agricultural towns, and rural townships along the St. Lawrence and Ottawa River corridors.

Candidates

Eric Duncan (Conservative) is the incumbent, first elected in 2019 and re-elected in 2021 and 2025. Born in 1987, Duncan grew up in North Dundas and was elected as a municipal councillor at age 18. Four years later, at 22, he became mayor of North Dundas, serving two terms from 2010 to 2018. He also became the youngest regional Warden of the United Counties of Stormont, Dundas and Glengarry in the body's 170-year history and was the first to serve a second consecutive year as Warden. Before entering federal politics, Duncan spent nine years as executive assistant to longtime Conservative MP Guy Lauzon. He is the first openly gay Conservative MP elected to the House of Commons.

Sarah Good (Liberal) is a Cornwall city councillor with a career spent primarily in social services, though she has also worked in food service, retail, and construction. She was acclaimed as the Liberal candidate.

Mario Leclerc (NDP) is a paralegal at the Administrative Housing Tribunal and a longtime advocate for workers' rights. He first ran for the NDP in Stormont--Dundas--South Glengarry in 2011 under Jack Layton's leadership and returned to the ballot for a second time in 2025.

Gordon Kubanek (Green Party) also stood as a candidate in the riding.

About the Riding

Cornwall, the riding's largest community with a population of roughly 48,000, sits on the St. Lawrence River at the eastern end of the Thousand Islands section of the St. Lawrence Seaway. Once a major textile and paper-manufacturing centre, the city has reinvented itself around healthcare, call-centre operations, logistics, and a growing technology and professional services sector. The Cornwall Community Hospital, the St. Lawrence River Institute, and Nav Canada's training centre are among the city's notable employers. Cornwall's bilingual character, with roughly a third of residents identifying French as their mother tongue, reflects its position on the Ontario-Quebec border.

Beyond Cornwall, the riding is predominantly rural. Dairy farming, cash crops, and maple syrup production sustain communities across the townships of North and South Dundas, North and South Stormont, and North and South Glengarry. The towns of Winchester, Morrisburg, and Alexandria serve as local service centres. Morrisburg is home to Upper Canada Village, a living-history museum and tourist attraction on the St. Lawrence. The Mohawk community of Akwesasne straddles the Ontario-Quebec-New York border, giving the riding a unique cross-border dimension.

In 2025, affordability and healthcare access were central concerns. Cornwall and the surrounding counties faced physician shortages and limited hospital capacity. The US trade dispute was felt acutely in a riding with deep cross-border ties, as Akwesasne and Cornwall sit directly across from the United States, and local agriculture depends on American markets. Infrastructure investment, rural broadband, and the economic future of Cornwall's evolving industrial base were additional priorities for voters.