📌 The Canadian federal electoral district of Markham—Unionville was contested in the 2011 election.

🏆 John McCallum, the Liberal candidate, won the riding with 19,429 votes (38.9% of the vote).

🥈 The runner-up was Bob Saroya (Conservative) with 17,734 votes (35.5%), defeated by a margin of 1,695 votes.

📊 Other notable candidates: Nadine Marie Hawkins (NDP-New Democratic Party, 22%).