Argenteuil—La Petite-Nation

Argenteuil—La Petite-Nation follows the north bank of the Ottawa River through western Quebec, stretching from the fringes of Gatineau through the villages of Thurso and Montebello to the small city of Lachute, then reaching northward into the Laurentian foothills. Created by the 2012 redistribution from parts of the former Argenteuil—Papineau—Mirabel and Pontiac ridings, the constituency mixes francophone and anglophone communities across a largely rural and semi-rural landscape of roughly 109,000 people.

Candidates

Stéphane Lauzon (Liberal) — The incumbent, first elected in 2015, Lauzon began his career as a welder at the Canadian International Paper Company before retraining as a vocational instructor in 1992 and teaching for two decades. He later founded a construction management company and was elected to Gatineau city council in 2009, where he chaired the sports and recreational life committee before resigning to run federally. In Parliament, he served as Parliamentary Secretary to the Minister of Seniors.

Yves Destroismaisons (Bloc Québécois) — A social worker specializing in mental health, Destroismaisons had more than twenty years of experience in Quebec's CLSC community health centres. He served as coordinator of Boulev'Art de la Vallée, a Saint-André-Avellin organization supporting people with mental health challenges. He had previously carried the Parti Québécois colours in the 2018 provincial election.

Marie Louis-Seize (Conservative) — Louis-Seize was the Conservative Party candidate in the riding.

Charlotte Boucher Smoley (NDP) — Boucher Smoley represented the NDP in the contest.

Marjorie Valiquette (Green Party) — Valiquette ran for the Green Party.

Sherwin Edwards (People's Party) also stood as a candidate.

About the Riding

The region's economy was historically built on lumber and paper production, with Lachute and Thurso serving as mill towns. Thurso's former paper mill was converted into a dissolving pulp facility by Fortress Paper, though deindustrialization pressures continued to push the area toward economic diversification. Tourism is a growing sector, centred on Montebello's Château Montebello — a Fairmont hotel housed in what is billed as the world's largest log cabin — and the nearby Omega Wildlife Park. Louis-Joseph Papineau's 19th-century manor at Montebello remains a national historic site. Anglophone communities cluster around Lachute and Grenville, while francophone populations predominate across the rest of the riding. Many residents commute to Gatineau and Ottawa for work. High-speed internet access in rural areas, federal infrastructure investment, and the housing market were among the central campaign issues.