Supercross
| Series | Rider | refer |
|---|---|---|
| FIM Supercross World Championship | Chad Reed | |
| AMA Supercross | ||
| AMA Supercross Lites | West: Jason Lawrence | |
| East: Trey Canard | ||
| Australian Supercross Championship | Pro Open: Chad Reed | |
| Lites: Matt Moss | ||
| National Summer of Supercross | Pro Open: Daniel McCoy | |
| Pro Lites: Matt Moss | ||
| Junior Lites: Tye Simmonds | ||
| 125cc Arenacross 13-16: Luke Clout | ||
| British Supercross Championship | Mike Brown | |
| X Games | ||
| Moto X Racing | Josh Hansen | |
| Moto X Women's Racing | Tarah Gieger | |
Read more about this topic: List Of 2008 Motorsport Champions, Motorcycle