The 2015 United States Grand Prix was a Formula One motor race that took place on October 25, 2015. The race held at the Circuit of the Americas. It was the sixteenth round of the 2015 season.

The three-day event was run during a downpour of rain; as a result, the second practice session and the final qualifying session were cancelled, while the whole of qualifying was delayed until the morning of the race day.

Hamilton won the race, passing Nico Rosberg in the later stages, and thereby secured his third Drivers' Championship, as Sebastian Vettel finished third. An incident-packed race saw only twelve cars reach the finish line, with Max Verstappen repeating his best result of the season in fourth and Jenson Button finishing a season-best sixth. After starting in damp conditions, both Red Bull drivers were initially able to challenge the Mercedes for the lead, but later dropped back as the track dried, with Daniil Kvyat retiring after a crash and Daniel Ricciardo eventually finishing tenth.