List of 1973 motorsport champions
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| 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 | Champion | Refer |
|---|---|---|
| NHRA Drag Racing Series | Top Fuel:  Jerry Ruth |
1973 NHRA Drag Racing Series |
| Funny Car: Frank Hall | ||
| Pro Stock: Wayne Gapp | ||
Karting
| Series | Driver | Season article |
|---|---|---|
| Karting World Championship |  Terry Fullerton |
|
Junior:  Alain Prost | ||
| Karting European Championship |  Gabriele Gorini |
|
Motorcycle racing
Motocross
| 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 | ||
Open wheel racing
Rallying
Sports car and GT
| 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 |
