| Series |
Champion(s) |
refer |
| FIA World Endurance Championship |
 Timo Bernhard[126]
 Mark Webber[126]
 Brendon Hartley[126] |
2015 FIA World Endurance Championship |
LMP1-Private:  Nicolas Prost
LMP1-Private:  Mathias Beche |
GT:  Richard Lietz[126] |
LMP2:  Roman Rusinov[127]
LMP2: Julien Canal[127]
LMP2:  Sam Bird[127] |
LMGTE Am Drivers: Viktor Shaitar[128]
LMGTE Am Drivers: Aleksey Basov[128]
LMGTE Am Drivers:  Andrea Bertolini[128] |
| Manufacturers: Porsche[129] |
| GT Manufacturers: Porsche[126] |
| Private LMP1 Teams: Rebellion Racing |
| LMP2 Teams: G-Drive Racing[127] |
| LMGTE Pro Teams: Porsche Team Manthey[126] |
| LMGTE AM Teams: SMP Racing[130] |
| United SportsCar Championship |
Prototype:  João Barbosa[131]
Prototype:  Christian Fittipaldi[131] |
2015 United SportsCar Championship |
PC:  Jon Bennett[131]
PC: Colin Braun[131] |
| GTLM: Patrick Pilet[132] |
GTD: Townsend Bell[133]
GTD: Bill Sweedler[133] |
| Prototype Teams: Action Express Racing[131] |
| PC Teams: CORE Autosport[131] |
| GTLM Teams: Porsche North America[132] |
| GTD Teams: Scuderia Corsa |
| Prototype Manufacturers: Chevrolet[134] |
| GTLM Manufacturers: Porsche[132] |
| GTD Manufacturers: Ferrari |
| British GT Championship |
GT3: Andrew Howard
GT3: Jonathan Adam |
2015 British GT Championship |
GT4: Jamie Chadwick
GT4: Ross Gunn |
| European Le Mans Series |
LMP2:  Björn Wirdheim[135]
LMP2: Gary Hirsch[135]
LMP2: Jon Lancaster[135] |
2015 European Le Mans Series |
LMP3: Charlie Robertson[136]
LMP3: Chris Hoy[136] |
GTE: Andrea Rizzoli[135]
GT3:  Johnny Laursen[135]
GT3: Mikkel Mac[135] |
GTC: Dino Lunardi[135]
GTC: Eric Dermont[135]
GTC: Franck Perera[135] |
| LMP2 Teams: Greaves Motorsport[137] |
| LMP3 Teams: Team LNT[136] |
| GTE Teams: Formula Racing |
| GTC Teams: TDS Racing[138] |
| Blancpain GT Series |
 Robin Frijns[139] |
2015 Blancpain GT Series |
Teams:  Belgian Audi Club Team WRT |
| Blancpain Endurance Series |
Pro: Alex Buncombe[140]
Pro:  Katsumasa Chiyo[140]
Pro: Wolfgang Reip[140] |
2015 Blancpain Endurance Series |
Pro-Am: Duncan Cameron[141]
Pro-Am:  Matt Griffin[141] |
Am: Ian Loggie[140]
Am: Julian Westwood[140] |
| Pro Teams: Belgian Audi Club Team WRT[140] |
| Pro-Am Teams: AF Corse[141] |
| Am Teams: AKKA ASP[140] |
| Blancpain Sprint Series |
Pro: Maximilian Buhk[139]
Pro: Vincent Abril[139] |
2015 Blancpain Sprint Series |
| Pro-Am: Aleksey Karachev[139] |
| Silver Cup: Jules Szymkowiak[139] |
| Pro Teams: Belgian Audi Club Team WRT |
| Pro-Am Teams: GT Russian Team |
| Silver Cup Teams: Bentley Team HTP |
| ADAC GT Masters |
Sebastian Asch[142]
Luca Ludwig[142] |
2015 ADAC GT Masters |
| Teams: BMW Sports Trophy Team Schubert |
| Amateur: Andreas Weishaupt[143] |
| GT4 European Series |
Pro: Marcel Nooren[144]
Pro: Jelle Beelen[144] |
2015 GT4 European Series |
| Teams: V8 Racing[144] |
| Am: Daniel Uckermann[144] |
| International GT Open |
Overall: Álvaro Parente[145]
Overall: Miguel Ramos[145] |
2015 International GT Open |
GT3 Pro-Am: Álvaro Parente[145]
GT3 Pro-Am: Miguel Ramos[145] |
| GT3 Am: Claudio Sdanewitsch[145] |
Cup Pro-Am: James Abbott
Cup Pro-Am: Shahin Nouri |
| Cup Am: James Abbott |
| Teams: AF Corse |
| Australian GT Championship |
Christopher Mies |
2015 Australian GT Championship season |
Trophy: Greg Taylor[146]
Trophy: Barton Mawer[146] |
| Super GT |
GT500: Tsugio Matsuda[147]
GT500: Ronnie Quintarelli[147] |
2015 Super GT Series |
GT300:  André Couto[148] |
| GT500 Teams: Nismo[147] |
| GT300 Teams: Gainer |
| Audi Sport TT Cup |
 Jan Kisiel |
2015 Audi Sport TT Cup |
| Trans-Am Series |
TA1: Amy Ruman[149] |
2015 Trans-Am season |
| TA2: Gar Robinson[150] |
| TA3-A: Ernie Francis Jr. |
| TA3-I: Lee Saunders |
| Porsche Carrera Cup |
| Porsche Supercup |
Philipp Eng |
2015 Porsche Supercup |
| Rookie: Matteo Cairoli |
| Teams: Lechner Racing Middle East |
| Porsche Carrera Cup Germany |
Philipp Eng[151] |
2015 Porsche Carrera Cup Germany |
| Teams: Deutsche Post by Project 1[152] |
| B–Class: Rolf Ineichen[152] |
Rookie:  Alexander Toril[152] |
| Porsche Carrera Cup Great Britain |
Daniel Cammish[153] |
2015 Porsche Carrera Cup Great Britain |
Pro–Am:  Ignas Gelžinis[154] |
| Pro–Am2: John McCullagh[153] |
| Porsche Carrera Cup France |
Maxime Jousse[155] |
|
| Teams: Sébastien Loeb Racing |
| B–Class: Christophe Lapierre[155] |
| Porsche Carrera Cup Asia |
Chris van der Drift[156] |
|
Class B:  Yuey Tan[156] |
| Porsche Carrera Cup Japan |
Yuya Motojima |
|
| Teams: Team Ktouch Porsche |
| Gentleman: Shinji Takei |
| Porsche Carrera Cup Scandinavia |
Johan Kristoffersson |
|
| Teams: Kristoffersson Motorsport |
| Porsche Carrera Cup Australia |
Nick Foster[157] |
2015 Australian Carrera Cup Championship |
| Elite Class: Shane Smollen |
| Porsche Carrera Cup Italy |
Riccardo Agostini[158] |
2015 Porsche Carrera Cup Italy season |
Teams:  Tsunami Racing Team |
| Michelin Cup: Alberto de Amicis |
| Lamborghini Super Trofeo |
| Lamborghini Super Trofeo Europe |
Pro:  Patrick Kujala[159] |
2015 Super Trofeo Europe |
| Pro-Am: Loris Spinelli |
Am:  Shota Abkhazava[160] |
| Pro Teams: Bonaldi Motorsport |
| Pro-Am Teams: Leipert Motorsport |
| Am Teams: Artline Team Georgia[160] |
| Lamborghini Super Trofeo North America |
Pro: Richard Antinucci[161] |
2015 Super Trofeo North America |
| Pro-Am: Corey Lewis |
| Am: Ryan Ockey[161] |
| Teams: O'Gara Motorsport[161] |
| Lamborghini Super Trofeo Asia |
 Afiq Yazid |
2015 Super Trofeo Asia |
Pro-Am:  Dilantha Malagamuwa
Pro-Am:  Armaan Ebrahim |
Paul Bonhomme[1]
Mikaël Brageot[2]
Jonathan Davenport
Micke Kågered
Dennis Habermann
Jack Shanahan
Masato Kawabata
Darren Kelly
Piotr Więcek
Fredric Aasbø
Alex Heilbrunn
Hankook
Jorrit Pex
Marta García
Flavio Camponeschi
Christian Lundgaard
Ferenc Kancsar
Qatar Team
Simon Kurzbuch[75]
Bruno Coelho[81]
Keven Hebert[97]
Kyle McBride[108]
Patrick Schweinzer
Jörg Miikael Tiit
Jānis Baumanis[122]
Buggyra International Racing System
Leandro Totti