This list of 2003 motorsport champions is a list of national or international auto racing series with a Championship decided by the points or positions earned by a driver from multiple races.
Air racing Series Pilot refer Red Bull Air Race World Series Péter Besenyei 2003 Red Bull Air Race World Series
Dirt oval racing Series Champion Refer World of Outlaws Sprint Car Series Steve Kinser Teams: Steve Kinser Racing
Drag racing Series Champion Refer NHRA Powerade Drag Racing Series Top Fuel: Larry Dixon 2003 NHRA Powerade Drag Racing Series Funny Car: Tony Pedregon Pro Stock: Greg Anderson Pro Stock Motorcycle: Geno Scali
Drifting Series Champion Refer D1 Grand Prix Youichi Imamura 2003 D1 Grand Prix season D1NZ Jairus Wharerau 2003 D1NZ season
Karting Series Driver Season article Karting World Championship FA: Wade Cunningham CIK-FIA Karting European Championship FA: Bas Lammers S-ICC: Alessandro Manetti ICA: Nicola Bocchi ICA-J: Nicholas Risitano Rotax Max Challenge MAX: Cristiano Morgado Junior: Omar Martin
Motorcycle Series Rider Season article MotoGP World Championship Valentino Rossi 2003 Grand Prix motorcycle racing season 250cc World Championship Manuel Poggiali 125cc World Championship Daniel Pedrosa Superbike World Championship Neil Hodgson 2003 Superbike World Championship season Supersport World Championship Chris Vermeulen Speedway World Championship Nicki Pedersen 2003 Speedway Grand Prix AMA Superbike Championship Mat Mladin Australian Superbike Championship Craig Coxhell
Open wheel racing Series Driver Season article FIA Formula One World Championship Michael Schumacher 2003 Formula One World Championship Constructors: Ferrari Champ Car World Series Paul Tracy 2003 CART season Manufacturers: Lola Rookies: Sébastien Bourdais IndyCar Series Scott Dixon 2003 IndyCar Series Manufacturers: Toyota Rookies: Dan Wheldon Infiniti Pro Series Mark Taylor 2003 Infiniti Pro Series season Historic Formula One Championship Mike Wrigley 2003 Historic Formula One Championship Atlantic Championship A. J. Allmendinger 2003 Atlantic Championship season Australian Drivers' Championship Daniel Gaunt 2003 Australian Drivers' ChampionshipBarber Dodge Pro Series Leonardo Maia2003 Barber Dodge Pro SeriesEuro Formula 3000 Series Augusto Farfus2003 Euro Formula 3000 Series Formula Nippon Championship Satoshi Motoyama 2003 Formula Nippon Championship Teams: Team ImpulFormula Volkswagen Germany Jaap van Lagen2003 Formula Volkswagen Germany seasonInternational Formula 3000 Championship Björn Wirdheim2003 International Formula 3000 Championship World Series by Lights Juan Cruz Álvarez 2003 World Series Lights season World Series by Nissan Franck Montagny 2003 World Series by Nissan season Formula Palmer Audi Ryan Lewis 2003 Formula Palmer Audi Autumn Trophy: Jonathan Kennard EuroBOSS Series Klaas Zwart 2003 EuroBOSS Series Teams: Team Ascari JAF Japan Formula 4 Kantō: Kei Idaka 2003 JAF Japan Formula 4 Kansai: Kenji Ōtaki Formula Dream Hideki Mutoh 2003 Formula Dream Formula König Franz Kuncic 2003 Formula König season Teams: Kern Motorsport Formula Toyota Kazuki Nakajima 2003 Formula Toyota season Star Mazda Championship Luis Schiavo 2003 Star Mazda ChampionshipFormula Dodge National Championship Raphael MatosMasters: Chris Wilcox Formula Dodge Eastern Championship Marco AndrettiMasters: Mark PattersonFormula Dodge Midwestern Championship Salvador DuránMasters: John GreistFormula Dodge Southern Championship Joe D'AgostinoMasters: John PewFormula Dodge Western Championship Ricky SchmidtMasters: Jim MashburnSkip Barber Challenge Matt Franc Formula Lista Junior Romain Grosjean 2003 Formula Lista Junior seasonFormula RUS Yuri Baiborodov Russian Formula 1600 Championship Alexander Tyuryumin 2003 Russian Formula 1600 Championship Teams: ArtLine Engineering United States Speedway Series Mike Koss 2003 United States Speedway Series Formula Three Formula 3 Euro Series Ryan Briscoe 2003 Formula 3 Euro Series season Rookie: Christian Klien Nation: France Asian Formula Three Championship Pepon Marave 2003 Asian Formula Three Championship Teams: Kinetic F3 Racing Team Australian Formula 3 Championship Michael Caruso 2003 Australian Formula 3 Championship Trophy Class: David Borg Austria Formula 3 Cup Diego Romanini 2003 Austria Formula 3 Cup Trophy: Jörg Sandek British Formula 3 Championship Alan van der Merwe 2003 British Formula Three Championship National: Ernesto Viso All-Japan Formula Three Championship James Courtney 2003 Japanese Formula 3 Championship Teams: TOM'S Chilean Formula Three Championship Cristobal Puig 2003 Chilean Formula Three Championship Finnish Formula Three Championship Andrea Belicchi 2003 Finnish Formula Three Championship Teams: Lukoil Racing German Formula Three Championship João Paulo de Oliveira 2003 German Formula Three season Rookie: Sven Barth Italian Formula Three Championship Fausto Ippoliti 2003 Italian Formula Three season Spanish Formula Three Championship Ricardo Mauricio 2003 Spanish Formula Three season Teams: Racing Engineering Trofeo Ibérico: Borja García Copa de España Júnior: Ricardo Risatti Formula 3 Sudamericana Danilo Dirani 2003 Formula 3 Sudamericana season Light: Rodrigo Ribeiro Formula RenaultFormula Renault V6 Eurocup José María López2003 Formula Renault V6 EurocupTeams: ARTA-Signature Formula Renault 2000 Masters Esteban Guerrieri 2003 Formula Renault 2000 Masters season Teams: JD MotorsportFormula Renault 2000 UK Lewis Hamilton2003 Formula Renault 2000 UK seasonWinter Series: Jay HowardChampionnat de France Formula Renault 2000 Loïc DuvalFormula Renault BARC James GornallFormula Renault 2000 Italia Franck PereraTeams: Prema PowerteamWinter Series: Pastor MaldonadoFormula Renault 2000 Germany Ryan SharpFormula Renault 2000 Netherlands Paul MeijerFormula Renault 2000 Scandinavia Tom PedersenRenault Speed Trophy F2000 Manuel BenzMexican Formula Renault Championship Homero RichardsFormula Renault 2000 Brazil Allam KhodairNorth American Fran Am 2000 Pro Championship Andrew RangerWinter Series: Charles HallAsian Formula Renault Challenge Rodolfo ÁvilaTeams: Asia Racing TeamFormula Campus by Renault and Elf Laurent GroppiFormula Renault 1600 Argentina Maximiliano MerlinoFormula Renault 1600 Belgium Jérôme d'AmbrosioFormula Junior 1600 Italia powered by Renault Marino SpinozziWinter Series: Domenico CapuanoFormula Junior 1600 Spain Juan Antonio del PinoNorth American Fran Am 1600 Pro Championship Colin BraunFormula Super Renault Federico Lifschitz Formula BMW Formula BMW ADAC Maximilian Götz 2003 Formula BMW ADAC season Teams: ADAC Berlin-Brandenburg Formula BMW Asia Ho-Pin Tung2003 Formula BMW Asia season Teams: Team MeritusF. Baviera Junior Cup Juan Cáceres Formula Ford Australian Formula Ford Championship Neil McFadyen 2003 Australian Formula Ford Championship Benelux Formula Ford Championship Michel Florie 2003 Benelux Formula Ford Championship British Formula Ford Championship Tom Kimber-Smith 2003 British Formula Ford Championship Dutch Formula Ford Championship Nelson van der Pol 2003 Dutch Formula Ford Championship Formula Ford Zetec Championship Series Jonathan Bomarito 2003 Formula Ford Zetec Championship Series New Zealand Formula Ford Championship Jonny Reid 2002–03 New Zealand Formula Ford Championship
Rallying Series Driver/Co-Driver Season article World Rally Championship Petter Solberg2003 World Rally Championship Co-Drivers: Phil Mills Manufacturers: Citroën Junior World Rally Championship Brice Tirabassi Production World Rally Championship Martin Rowe African Rally Championship Fernando Rueda 2003 African Rally Championship Asia-Pacific Rally Championship Armin Kremer 2003 Asia-Pacific Rally Championship Co-Drivers: Fred Berssen Australian Rally Championship Cody Crocker 2003 Australian Rally Championship Co-Drivers: Greg Foletta British Rally Championship Jonny Milner 2003 British Rally Championship Co-Drivers: Nicky Beech Canadian Rally Championship Tom McGeer 2003 Canadian Rally Championship Co-Drivers: Philip Erickson Czech Rally Championship Václav Pech 2003 Czech Rally Championship Co-Drivers: Petr Uhel Deutsche Rallye Meisterschaft Hermann Gassner Sr. Estonian Rally Championship A>2000: Slava Popov 2003 Estonian Rally Championship A>2000 Co-Drivers: Sergei Larens N 2000+: Ivar Raidam N 2000+ Co-Drivers: Robert Lepikson European Rally Championship Bruno Thiry 2003 European Rally Championship Co-Drivers: Jean-Marc Fortin French Rally Championship Alexandre Bengué Hungarian Rally Championship Balázs Benik Co-Drivers: Pál Somogyi Indian National Rally Championship V. R. Naren Kumar Co-Drivers: D. Ram Kumar Italian Rally Championship Paolo Andreucci Co-Drivers: Anna Andreussi Manufacturers: Fiat Middle East Rally Championship Nasser Al-Attiyah New Zealand Rally Championship Bruce Herbert 2003 New Zealand Rally Championship Co-Drivers: Rob Ryan Polish Rally Championship Tomasz Czopik Romanian Rally Championship Mihai Leu Scottish Rally Championship Raymond Munro Co-Drivers: Neil Ewing Slovak Rally Championship Václav Pech Co-Drivers: Petr Uhel South African National Rally Championship Serge Damseaux Co-Drivers: Robert Paisley Manufacturers: Toyota Spanish Rally Championship Miguel Ángel Fuster Co-Drivers: José Vicente Medina
Rallycross Series Driver Season article FIA European Rallycross Championship Div 1: Kenneth Hansen Div 2: Jaroslav Kalný 1400 Cup: Guttorm Lindefjell British Rallycross Championship Dermot Carnegie
Sports car and GT Series Driver Season article American Le Mans Series LMP900: Frank BielaLMP900: Marco Werner 2003 American Le Mans Series season LMP675: Chris Dyson GTS: Ron FellowsGTS: Johnny O'Connell GT: Lucas LuhrGT: Sascha Maassen British GT Championship GTO: Tom Herridge 2003 British GT Championship GT Cup: Matt GriffinGT Cup: Patrick Pearce Rolex Sports Car Series DP: Terry Borcheller 2003 Rolex Sports Car Series season SRPII: Steve Marshall GTS: Tommy RigginsGTS: Dave Machavern GT: Cort WagnerGT: Brent Martini FIA Sportscar Championship SR1: Jan LammersSR1: John Bosch 2003 FIA Sportscar Championship season SR1 Teams: Racing for Holland SR2: Mirko SavoldiSR2: Piergiuseppe Peroni SR2 Teams: Lucchini Engineering FIA GT Championship GT: Thomas BiagiGT: Matteo Bobbi 2003 FIA GT Championship season GT Teams: BMS Scuderia Italia N-GT: Stéphane OrtelliN-GT: Marc Lieb N-GT Teams: Freisinger MotorsportPorsche Supercup, Porsche Carrera Cup, GT3 Cup Challenge and Porsche Sprint Challenge Porsche Supercup Frank Stippler 2003 Porsche Supercup Teams: Farnbacher Racing Porsche Carrera Cup Asia Charles Kwan 2003 Porsche Carrera Cup Asia Australian Carrera Cup Championship Jim Richards 2003 Australian Carrera Cup Championship Porsche Carrera Cup France Philippe Gache 2003 Porsche Carrera Cup France Teams: Larbre Compétition Porsche Carrera Cup Germany Frank Stippler 2003 Porsche Carrera Cup Germany Teams: UPS Porsche Junior Team Porsche Carrera Cup Great Britain Barry Horne 2003 Porsche Carrera Cup Great Britain Teams: Team Parker Racing Porsche Carrera Cup Japan Masayuki Yamamoto 2003 Porsche Carrera Cup Japan
Stock car racing Series Driver Season article NASCAR Winston Cup Series Matt Kenseth 2003 NASCAR Winston Cup Series Manufacturers: Chevrolet NASCAR Busch Series Brian Vickers 2003 NASCAR Busch Series Manufacturers: Chevrolet NASCAR Craftsman Truck Series Travis Kvapil 2003 NASCAR Craftsman Truck Series Manufacturers: Dodge NASCAR Busch North Series Andy Santerre 2003 NASCAR Busch North Series NASCAR Winston West Series Scott Lynch 2003 NASCAR Winston West Series ARCA Re/Max Series Frank Kimmel 2003 ARCA Re/Max Series ASCAR Racing Series Ben Collins 2003 ASCAR season Turismo Carretera Ernesto Bessone 2003 Turismo Carretera
Touring car