Châteauguay—Lacolle

Châteauguay—Lacolle is a federal riding in the Montérégie region south of Montreal, stretching from the St. Lawrence River city of Châteauguay southward through rich agricultural flatlands to the American border at Saint-Bernard-de-Lacolle. The riding reaches east as far as Napierville and west to Sainte-Martine. Châteauguay itself, with roughly 48,000 residents, functions as a bedroom community for Montreal. The border crossing at Saint-Bernard-de-Lacolle on Highway 15—the Montreal–New York corridor—is the busiest in the province. The riding is largely francophone, with nearly sixty-eight percent of the population speaking French as a mother tongue, and about ten percent of residents are immigrants.

Candidates

Brenda Shanahan (Liberal) — Born in 1958, Shanahan was a former banker and social worker with a long-standing commitment to community service in the Châteauguay area. She was first elected in the riding in 2015 and re-elected in 2019 by a margin of roughly 600 votes. She championed environmental protection, support for families and seniors, and local economic development.

Patrick O'Hara (Bloc Québécois) — O'Hara was a business leader who had lived in the Châteauguay—Lacolle riding for more than twenty-five years. He had worked as a restaurant manager and later directed a tire company in Châteauguay. He was active in community philanthropy, participating in events for the Anna-Laberge Foundation, Gisèle Faubert Foundation, and Governors of Hope Foundation.

Pierre Bournaki (Conservative) — Born in Montreal to a Greek immigrant father and a Valleyfield-born mother, Bournaki grew up in Châteauguay from age four. He studied health sciences at Cégep Marguerite-Bourgeoys and earned a master's degree in international finance from Columbia University. A portfolio and pension fund manager, he was also a classically trained violinist who had been a member of the National Youth Orchestra of Canada and performed at the Montreux Jazz Festival with the group Aquarelle. He entered politics after a severe bout with COVID-19 in 2020.

Hannah Wolker (NDP) — Wolker represented the New Democratic Party in the riding.

Frédéric Olivier (Green) — Olivier was the Green Party candidate.

Jeff Benoit (PPC) — Benoit ran for the People's Party of Canada.

About the Riding

Châteauguay—Lacolle combines a suburban city with a vast agricultural hinterland. South of Châteauguay, the terrain flattens into some of Quebec's most fertile farmland, producing crops that supply Montreal, the province, eastern Ontario, and the northeastern United States. The Chateauguay River winds through the riding, and the surrounding valley has been settled since the eighteenth century. Châteauguay is notable for the 1813 Battle of Châteauguay, where Canadian and allied forces repelled an American advance during the War of 1812.

The Saint-Bernard-de-Lacolle border crossing is a defining feature of the riding's southern end. Highway 15 funnels traffic between Montreal and the Interstate 87 corridor toward New York, making the crossing point a focal point for trade and, at times, for asylum-seeker arrivals via Roxham Road.

The 2021 election in Châteauguay—Lacolle produced one of the closest contests in the country. On election night, Bloc Québécois candidate Patrick O'Hara appeared to have defeated Liberal incumbent Brenda Shanahan. However, Elections Canada identified a recording error in which advance poll ballots were attributed to the wrong parties. A judicial recount—the first since 2008 to overturn a preliminary result—ultimately confirmed Shanahan's victory. The contest underscored the riding's status as a bellwether of Liberal–Bloc competition in the greater Montreal suburbs.