2015 FIA World Endurance Championship

The 2015 FIA World Endurance Championship season was the fourth season of the FIA World Endurance Championship auto racing series, co-organized by the Fédération Internationale de l'Automobile (FIA) and the Automobile Club de l'Ouest (ACO). The series was open to Le Mans Prototypes and grand tourer-style racing cars meeting four ACO categories. World championship titles were awarded for Le Mans Prototypes drivers and for manufacturers in the LMP1 category, and several World Endurance Cups and Endurance Trophies were also awarded in all four categories. The season began at the Silverstone Circuit in April and ended at the Bahrain International Circuit in November after eight rounds, and included the 83rd running of the 24 Hours of Le Mans.

Porsche secured the World Manufacturers' Championship at the 6 Hours of Shanghai, beating Audi by eighty points. Porsche's Timo Bernhard, Mark Webber, and Brendon Hartley won the World Drivers' Championship in the final round of the season, ahead of Audi's André Lotterer, Benoît Tréluyer, and Marcel Fässler. Porsche teammates Marc Lieb, Romain Dumas, and Neel Jani were third in the championship standings. Bernhard, Webber, and Hartley won four consecutive races over the course of the season. Porsche also won the World Endurance Cup for GT Manufacturers in the final event, overcoming the lead held by Ferrari earlier in the season. Richard Lietz of Porsche won the World Endurance Cup for GT Drivers over three-time defending Cup winner Gianmaria Bruni and his teammate Toni Vilander.

Rebellion Racing and their drivers Mathias Beche and Nicolas Prost won the trophies for LMP1 class private entries despite not participating in the first two rounds of the championship. The championships were Rebellion's fourth and Beche and Prost's second consecutive trophy titles respectively. Roman Rusinov, Julien Canal, and Sam Bird of G-Drive Racing secured the LMP2 class trophies over the KCMG team. Porsche Team Manthey won the LMGTE Professional category trophy for teams over Ferrari representative AF Corse. The LMGTE Amateur category trophies were won by SMP Racing and their drivers Viktor Shaitar, Aleksey Basov, and Andrea Bertolini, ahead of AF Corse's LMGTE Am entry.