1955 Grand Prix motorcycle racing season

Geoff Duke (pictured in 1951) won his last 500cc World Championship title in 1955.

The 1955 Grand Prix motorcycle racing season was the seventh F.I.M. Road Racing World Championship Grand Prix season. The season consisted of eight Grand Prix races in five classes: 500cc, 350cc, 250cc, 125cc and Sidecars 500cc. It began on 1 May, with Spanish Grand Prix and ended with Nations Grand Prix in Italy on 4 September.