The 2013 World Series by Renault was the ninth season of Renault Sport's series of events, with four different championships racing under one banner. Consisting of the Formula Renault 3.5 Series, Eurocup Formula Renault 2.0, the Eurocup Mégane Trophy and Eurocup Clio, 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.
The series began on 27 April at the Ciudad del Motor de Aragón in Alcañiz, and finished on 20 October at the Circuit de Barcelona-Catalunya, just outside Barcelona. Round Nürburgring dropped. While Red Bull Ring made its debut in the series' schedule, while Formula Renault 3.5 had two extra races on its own, in support of the Monaco Grand Prix and Monza Superstars Series round and Eurocup Clio had additional rounds in support of the Imola round of the Italian Clio Cup, and the Alcañiz round of the International Clio Cup.