The 2005 World Series by Renault- was the first season of Renault Sport's series of events, with three different championships racing under one banner.
| Circuit | Date | Series |
|---|---|---|
 Zolder | 30 April | All |
| 1 May | ||
| Circuit de Monaco | 22 May | FR3.5 |
 Circuito Ricardo Tormo | 3 June | All + Clio Cup Spain |
| 4 June | ||
 Bugatti Circuit | 10 July | All |
| 11 July | ||
| Circuito urbano de Bilbao | 16 July | All + Clio Cup Spain |
| 17 July | ||
| Motorsport Arena Oschersleben | 7 August | All |
| 8 August | ||
| Donington Park | 10 September | All |
| 11 September | ||
| Autódromo do Estoril | 1 October | All |
| 2 October | ||
 Autodromo Nazionale di Monza | 22 October | All |
| 23 October |
See main article: 2005 Formula Renault 3.5 Series season.
| Pos. | Driver | Team | Points | |
|---|---|---|---|---|
| 1 |  Robert Kubica | Epsilon Euskadi | 154 | |
| 2 | Adrián Vallés | Pons Racing | 116 | |
| 3 | Markus Winkelhock | Draco Multiracing USA | 114 | |
| 4 | Tristan Gommendy | Witmeur KTR | 96 | |
| 5 | Félix Porteiro | Epsilon Euskadi | 77 |
See main article: 2005 Eurocup Formula Renault 2.0 season.
| Pos. | Driver | Team | Points | |
|---|---|---|---|---|
| 1 |  Kamui Kobayashi | Prema Powerteam | 157 | |
| 2 | Michael Ammermüller | Jenzer Motorsport | 149 | |
| 3 | Yann Clairay | SG Formula | 125 | |
| 4 | Carlo van Dam | SG Formula | 100 | |
| 5 | Filipe Albuquerque | Motopark Academy | 63 |
See main article: 2005 Eurocup Mégane Trophy season.
| Pos. | Driver | Team | Points | |
|---|---|---|---|---|
| 1 | Jan Heylen | Racing for Belgium | 147 | |
| 2 | Renaud Derlot | TP Compétition | 134 | |
| 3 | Ludovic Badey | Pouchelon Racing | 108 | |
| 4 | Jeffrey van Hooydonk | Thierry Boutsen Racing | 89 | |
| 5 |  César Campaniço | Racing for Belgium | 85 |