In Canadian federal election history, one of the narrowest recorded victories occurred in the 2011 election in the riding of Etobicoke Centre. Conservative candidate Ted Opitz initially won by just 26 votes. Following a legal challenge, the Ontario Superior Court invalidated 79 ballots, which would have overturned the result. However, the Supreme Court of Canada later reinstated 59 of those ballots, ultimately confirming Opitz's victory by a mere 6 votes.
Another notably close race was in the 2008 federal election in Kitchener-Waterloo, where Conservative Peter Braid defeated Liberal incumbent Andrew Telegdi by just 17 votes after a judicial recount.
While these examples highlight some of the tightest margins in federal elections, there have been instances of even narrower outcomes in provincial elections. For example, in the 2021 Yukon territorial election, the Vuntut Gwitchin riding resulted in a tie, with both candidates receiving 78 votes. The winner was determined by drawing lots, a rare occurrence in Canadian politics.
These cases underscore the importance of every single vote in Canada's electoral system, where even a handful of ballots can determine the outcome of an election.