The 2015 Singapore Grand Prix was a Formula One motor race held on 20 September 2015 at the Marina Bay Street Circuit. The race was the thirteenth round of the 2015 season.

Vettel won the race from pole position, ahead of Red Bull's Daniel Ricciardo in second and Vettel's Ferrari teammate Kimi Räikkönen in third. The Mercedes team struggled at Singapore; Lewis Hamilton recorded his first retirement of the season, while Nico Rosberg managed only fourth place, closing the gap in the championship to 41 points.

This is the only Grand Prix in the 2015 season where Mercedes did not secure a pole position, with their drivers qualifying fifth and sixth.