This list of 1990 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.
| Series | Champion | Refer |
|---|---|---|
| NHRA Winston Drag Racing Series | Top Fuel:  Joe Amato | 1990 NHRA Winston Drag Racing Series |
| Funny Car: John Force | ||
| Pro Stock: Darrell Alderman | ||
| Pro Stock Motorcycle: John Myers | ||
| Series | Driver | Season article |
|---|---|---|
| CIK-FIA Karting World Championship | FK:  Jan Magnussen | |
Formula A:  Danilo Rossi | ||
| FC: Alessandro Piccini | ||
| CIK-FIA Junior World Cup |  Jérémie Dufour | |
| CIK-FIA Karting European Championship | FK: Martijn Koene | |
| ICC: Walter van Lent | ||
| FA: Fabiano Belletti | ||
| ICA: Eddy Coubard | ||
ICA-J:  Bas Leinders | ||
| World Superkart Championship |  Tim Parrott | |
| Series | Driver | Season article |
|---|---|---|
| World Sportscar Championship | Jean-Louis Schlesser Mauro Baldi | 1990 World Sportscar Championship season |
Teams:  Team Sauber Mercedes | ||
| IMSA GT Championship | GTP:  Geoff Brabham | 1990 IMSA GT Championship season |
Lights:  Tomás López | ||
| GTO: Dorsey Schroeder | ||
| GTU: Lance Stewart | ||
| All Japan Sports Prototype Championship |  Masahiro Hasemi Anders Olofsson | |
| Manufacturers: Nissan | ||
| Porsche Supercup, Porsche Carrera Cup, GT3 Cup Challenge and Porsche Sprint Challenge | ||
| Porsche Carrera Cup France | Michel Maisonneuve | 1990 Porsche Carrera Cup France |
| Porsche Carrera Cup Germany |  Olaf Manthey | 1990 Porsche Carrera Cup Germany |
| Teams: Team Derkum | ||
| Series | Driver | Season article |
|---|---|---|
| European Truck Racing Championship | Class A: Axel Hegmann | 1990 European Truck Racing Championship |
| Class B: Curt Göransson | ||
| Class C: Steve Parrish | ||
| Series | Driver | Season article |
|---|---|---|
| NASCAR Winston Cup Series | Dale Earnhardt | 1990 NASCAR Winston Cup Series |
| Manufacturers: Chevrolet | ||
| NASCAR Busch Grand National Series | Chuck Bown | 1990 NASCAR Busch Series |
| Manufacturers: Buick | ||
| NASCAR Busch North Series | Jamie Aube | 1990 NASCAR Busch North Series |
| NASCAR Winston West Series | Bill Schmitt | 1990 NASCAR Winston West Series |
| ARCA Bondo/Mar-Hyde Series | Bob Brevak | 1990 ARCA Bondo/Mar-Hyde Series |
| International Race of Champions | Dale Earnhardt | IROC XIV |
| AUSCAR | Brad Jones | 1989–90 AUSCAR season |
| Australian Super Speedway Championship | Robin Best | 1989–90 Australian Super Speedway Championship |
| Turismo Carretera |  Emilio Satriano | 1990 Turismo Carretera |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship |  Carlos Sainz | 1990 World Rally Championship |
| Co-Drivers: Luis Moya | ||
| Manufacturers: Lancia | ||
| FIA Cup for Production Cars | Alain Oreille Michel Roissard | |
| New Zealand Rally Championship |  David Ayling | 1990 New Zealand Rally Championship |
| Co-Drivers: Robert Haldane | ||
Ayrton Senna
Josef Neuhauser