The 2011 Japanese Grand Prix was a Formula One motor race that was held on 9 October 2011 at the Suzuka Circuit in Suzuka. It was the fifteenth round of the 2011 Formula One season.

The race was won by McLaren's Jenson Button, after he started from second on the grid. Fernando Alonso finished in second place for Scuderia Ferrari, and Sebastian Vettel completed the podium, with third, for Red Bull Racing.

Vettel had started the race in pole position alongside Button, whom he had marginally outqualified. The two drivers were the only two within mathematical contention for the title. Button attempted to overtake Vettel at the start of the race, yet was pressured towards the grass by Vettel which resulted in him losing his second position to third-placed starter Lewis Hamilton. Vettel was passed by Button in the second pit-stop phase, and was then passed by Alonso in the third. Hamilton slipped back from second to fifth, predominantly in the pit-stops; debris from a collision between himself and Felipe Massa caused a safety car period in the race. The second Red Bull of Mark Webber finished in fourth position.

As a consequence of the race, Vettel secured the World Drivers' Championship for the second year in succession.