This list of 1973 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 |
|---|---|---|
| European Touring Car Championship |  Toine Hezemans | |
| Australian Touring Car Championship |  Allan Moffat | 1973 Australian Touring Car Championship |
| Series | Driver | Season article | |
|---|---|---|---|
| NASCAR Grand National Series |  Benny Parsons | 1973 NASCAR Winston Cup Series | |
| NASCAR Grand Sport Series | 1973 NASCAR Grand Sport Series |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship |  Alpine-Renault | 1973 World Rally Championship season |
| Australian Rally Championship |  Peter Lang W Smith | |
