📌 The Canadian federal electoral district of London—Fanshawe was contested in the 2004 election.

🏆 Pat O'Brien, the Liberal candidate, won the riding with 15,550 votes (38.1% of the vote).

🥈 The runner-up was Irene Mathyssen (N.D.P.) with 12,416 votes (30.5%), defeated by a margin of 3,134 votes.

📊 Other notable candidates: John Mazzilli (Conservative, 26%).