📌 The Canadian federal electoral district of Chambly—Borduas was contested in the 2004 election.

🏆 Yves Lessard, the Bloc Québécois candidate, won the riding with 33,639 votes (61.0% of the vote).

🥈 The runner-up was Sophie Joncas (Liberal) with 12,466 votes (22.6%), defeated by a margin of 21,173 votes.

📊 Other notable candidates: Lucien Richard (Conservative, 8%).