| 1973 motorsport champions | |
| Previous: 1972 | Next: 1974 |
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 |
|---|---|---|
| World Sportscar Championship | Class S:  Matra | 1973 World Sportscar Championship |
Class GT:  Porsche | ||
| Canadian American Challenge Cup |  Mark Donohue | 1973 Can-Am season |
| Australian Sports Car Championship |  Phil Moore | 1973 Australian Sports Car Championship |
| IMSA GT Championship | Peter Gregg | 1973 IMSA GT Championship |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship | Alpine-Renault | 1973 World Rally Championship season |
| Australian Rally Championship | Peter Lang | 1973 Australian Rally Championship |
| Co-Drivers: Warwick Smith | ||
| Series | Rider | Season article |
|---|---|---|
| FIM Motocross World Championship | 500cc:  Roger De Coster | 1973 FIM Motocross World Championship |
250cc:  Håkan Andersson | ||
| AMA Motocross Championship | 500cc:  Pierre Karsmakers | 1973 AMA Motocross National Championship season |
| 250cc: Gary Jones | ||
| Series | Driver | Season article |
|---|---|---|
| Karting World Championship |  Terry Fullerton | |
| Junior: Alain Prost | ||
| Series | Champion | Refer |
|---|---|---|
| NHRA Drag Racing Series | Top Fuel: Jerry Ruth | 1973 NHRA Drag Racing Series |
| Funny Car: Frank Hall | ||
| Pro Stock: Wayne Gapp | ||
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