| 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 | 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 |
| Series | Driver | Season article |
|---|---|---|
| World Rally Championship | Lancia | 1975 World Rally Championship |
| Australian Rally Championship | Ross Dunkerton | 1975 Australian Rally Championship |
| Co-Drivers: John Large | ||
| New Zealand Rally Championship |  Rod Millen | 1975 New Zealand Rally Championship |
| Series | Driver | Season article |
|---|---|---|
| FIM Motocross World Championship | 500cc:  Roger De Coster | 1975 FIM Motocross World Championship |
| 250cc: Harry Everts | ||
| 125cc: Gaston Rahier | ||
| Series | Driver | Season article |
|---|---|---|
| Karting World Championship | François Goldstein | |
Junior:  Adrian Wepfer | ||
| 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 | ||
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