This list of 1951 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 Championship of Drivers |  Juan Manuel Fangio | 1951 Formula One season |
| AAA National Championship |  Tony Bettenhausen | 1951 AAA Championship Car season |
| British Formula Three Championship |  Eric Brandon | 1951 British Formula Three Championship |
| West German Formula Two Championship | Paul Pietsch | |
| West German Formula Three Championship | Walter Komossa | 1951 German Formula Three Championship |
| East German Formula Three Championship | Werner Lehmann | |
| Series | Driver | Season article | |
|---|---|---|---|
| NASCAR Grand National Series | Herb Thomas | 1951 NASCAR Grand National Series | |
| Turismo Carretera | Juan Gálvez |
