The 2015 European Le Mans Series season was the eleventh season of the Automobile Club de l'Ouest's (ACO) European Le Mans Series. The five-event season began at Silverstone Circuit, in conjunction with the FIA World Endurance Championship, on 11 April and finished at Autódromo do Estoril on 18 October.
In the lead LMP2 class, three teams did battle for the championship title; Greaves Motorsport, Thiriet by TDS Racing and Jota Sport. Jota Sport, and drivers Filipe Albuquerque, Simon Dolan and Harry Tincknell led the standings into the final race at Estoril, having won previously at the Red Bull Ring. However, it was Greaves Motorsport with the triumvirate of Gary Hirsch, Jon Lancaster and Björn Wirdheim who won the championship title; after winning at Silverstone, and Le Castellet, the trio finished second to Thiriet by TDS Racing in Estoril to secure the title by two points. Thiriet by TDS Racing's victory in Portugal – the team's second after a previous win at Imola – also allowed them to move ahead of Jota Sport in the teams' standings, with Ludovic Badey and Pierre Thiriet finishing as runners-up in the drivers' championship standings. Badey and Thiriet's victories were shared with Tristan Gommendy at Imola and Nicolas Lapierre at Estoril. In the new-for-2015 LMP3 class, Lawrence Tomlinson's Team LNT outfit won four of the five races during the season; three of which were won by former cyclist Chris Hoy and his teammate Charlie Robertson as they won the championship title with a round to spare. Hoy and Robertson finished 35 points clear of another Team LNT driver Gaëtan Paletou, who won the final race of the season with Michael Simpson at Estoril. Third place in the championship went to SVK by Speed Factory, and their drivers Konstantīns Calko and Dainius Matijošaitis. LNT's only defeat during the season occurred at Imola, when Morten Dons and Rob Garofall won for the University of Bolton team.