The 2011 Canadian Grand Prix was a Formula One motor race held on 12 June 2011 at the Circuit Gilles Villeneuve, in Montreal, Quebec. It was the seventh race of the 2011 Formula One World Championship.

McLaren driver Jenson Button won the race starting from seventh position. Sebastian Vettel, who started from pole position, finished second for Red Bull Racing with teammate Mark Webber finishing third.

The race began behind the safety car, and, once it returned to the pits, Vettel built a lead over Fernando Alonso. A second safety car deployment caused by the collision of Button and teammate Lewis Hamilton closed the time gaps between cars, but Vettel retained the lead. By lap 26, increasingly heavy rain led to the race's suspension, before it was restarted over two hours later. Button was involved in another collision on lap 37, which led to Alonso's retirement and Button falling to last place. Over the remainder of the race, he moved from twenty-first place to first, passing Webber and Michael Schumacher, who had started fourth and eighth respectively, for second place on lap 65, and Vettel on the final lap. Williams driver Rubens Barrichello finished in 9th place, scoring his final F1 points.

At over four hours (including a red flag period) the race set the record as the longest in Formula One history.