The 2015 Belgian Grand Prix was a Formula One motor race held on 23 August 2015 at the Circuit de Spa-Francorchamps in Spa. It was the eleventh round of the 2015 Formula One season.

Lewis Hamilton won the race for Mercedes, extending his championship lead over Rosberg, who finished second, to 28 points. Romain Grosjean and Lotus secured a podium finish for the first time since the 2013 United States Grand Prix, benefitting from a controversial tyre failure on Sebastian Vettel's Ferrari late in the race.

The race was identified by Scuderia Ferrari as their 900th Grand Prix participation. McLaren was handed a record 105-place grid penalty for a multitude of changes to their Honda power units.