The 2015 World Series by Renault was the eleventh season of Renault Sport's series of events, with three different championships racing under one banner. Consisting of the Formula Renault 3.5 Series, Eurocup Formula Renault 2.0 and Renault Sport Trophy, the World Series by Renault ran at seven different venues where fans could get into the meetings for no cost whatsoever, such is the uniqueness of the series. It was the first season with Renault Sport Trophy.
The series began on 25 April at the Ciudad del Motor de Aragón in Alcañiz, and finished on 18 October at the Circuito de Jerez, just outside Jerez de la Frontera. Round at Silverstone Circuit replaced Moscow Raceway round. Rounds at Circuit Paul Ricard was dropped. While Le Mans Bugatti returned to the series' schedule, while Formula Renault 3.5 Series had two extra races on its own, in support of the Monaco Grand Prix and Red Bull Ring European Le Mans Series round.