| Gaston Rahier | |
|---|---|
 Rahier in 1978 | |
| Nationality | Belgian |
| Born | 1 February 1947 Herve, Wallonia |
| Died | 8 February 2005 (aged 58) Paris, France |
| Motocross career | |
| Years active | 1967–1979 |
| Teams | ČZ, Ossa, Suzuki, Yamaha, Gilera |
| Championships | 125cc- 1975, 1976, 1977 |
| Wins | 29 |
Gaston Rahier (1 February 1947 – 8 February 2005) was a Belgian professional motocross racer. He competed in the Motocross World Championships from 1967 to 1979, most prominently as a member of the Suzuki factory racing team where he won three consecutive FIM 125cc Motocross World Championships. In 1977, Rahier was named the recipient of the Belgian National Sports Merit Award. After his motocross career, he became a successful Rally Raid competitor.