1978 FIM Motocross World Championship
| 1978 FIM Motocross World Championship | |
|---|---|
Fernando Muñoz at the 1978 250cc Spanish Grand Prix | |
| Organizer | FIM |
| Duration | 9 April/27 August |
| Number of races | 36 |
| Number of manufacturers | 18 |
| Champions | |
| 500cc | Heikki Mikkola |
| 250cc | Gennady Moiseyev |
| 125cc | Akira Watanabe |
The 1978 FIM Motocross World Championship was the 22nd F.I.M. Motocross Racing World Championship season.