This list of 1991 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 | Driver | Season article |
|---|---|---|
| World Sportscar Championship |  Teo Fabi | 1991 World Sportscar Championship season |
Teams:  Silk Cut Jaguar | ||
| IMSA GT Championship | GTP:  Geoff Brabham | 1991 IMSA GT Championship season |
Lights:  Parker Johnstone | ||
| GTO: Pete Halsmer | ||
| AAC: Dick Greer | ||
| GTU: John Fergus |
| Series | Driver | Season article |
|---|---|---|
| NASCAR Winston Cup Series | Dale Earnhardt | 1991 NASCAR Winston Cup Series |
| International Race of Champions | Rusty Wallace | IROC XV |
| Australian Super Speedway Championship | Robin Best | |
| AUSCAR | Brad Jones | |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship |  Juha Kankkunen | 1991 World Rally Championship season |
| Manufacturer: Lancia | ||
| FIA Cup for Production Cars |  Grégoire De Mévius | |
Mathias Arlt
