The 91st 24 Hours of Le Mans, also known as the Centenary 24 Hours of Le Mans, was an automobile endurance race for teams of three drivers each racing Prototype and Grand Touring cars held from 10 to 11 June 2023 at the Circuit de la Sarthe, near Le Mans, France, in front of 325,000 spectators. It was the 91st edition of the Automobile Club de l'Ouest's 24-hour race, its centenary anniversary edition and the fourth round of the 2023 FIA World Endurance Championship (WEC). The week before the event, on 4 June, there was a test day.

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.