The 85th 24 Hours of Le Mans was a 24-hour automobile endurance race for 60 teams of three drivers in Le Mans Prototype (LMP) and Le Mans Grand Touring Endurance (LMGTE) cars. It was held from 17 to 18 June 2017 at the Circuit de la Sarthe, near Le Mans, before 258,500 spectators. The race's 85th running, organised by the Automobile Club de l'Ouest, was the third of nine rounds in the 2017 FIA World Endurance Championship. A test day was held two weeks earlier on 4 June.

The Circuit des 24 Heures du Mans, also known as Circuit de la Sarthe located in Le Mans, Sarthe, France, is a semi-permanent motorsport race course, chiefly known as the venue for the 24 Hours of Le Mans auto race. Comprising private, race-specific sections of track in addition to public roads which remain accessible most of the year, its present configuration is 13.626 km (8.467 mi) long, making it one of the longest circuits in the world. The capacity of the race stadium, where the short Bugatti Circuit is situated, is 100,000. The Musée des 24 Heures du Mans is a motorsport museum located at the main entrance of the venue.