List of 1975 motorsport champions
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| 1975 motorsport champions | |
| Previous: 1974 | Next: 1976 |
This list of 1975 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 Winston Drag Racing Series | Top Fuel:  Don Garlits |
1975 NHRA Winston Drag Racing Series |
| Funny Car: Don Prudhomme | ||
| Pro Stock: Bob Glidden | ||
Karting
| Series | Driver | Season article |
|---|---|---|
| Karting World Championship |  François Goldstein |
|
Junior:  Adrian Wepfer | ||
| Karting European Championship | 100cc:  Gabriele Gorini |
|
FC:  Ben van Velzen | ||
Motorcycle racing
Motocross
| Series | Driver | Season article |
|---|---|---|
| FIM Motocross World Championship | 500cc: Roger De Coster |
1975 FIM Motocross World Championship |
| 250cc: Harry Everts | ||
| 125cc: Gaston Rahier | ||
Open wheel racing
Rallying
Sports car and GT
| Series | Driver | Season article |
|---|---|---|
| World Sportscar Championship | Class S: Alfa Romeo |
1975 World Sportscar Championship |
Class GT:  Porsche | ||
| Australian Sports Car Championship |  Garrie Cooper |
1975 Australian Sports Car Championship |
| IMSA GT Championship | Peter Gregg |
1975 IMSA GT Championship |
