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.
Points were awarded to the top six finishers in each race.
Bold – Pole Italics – Fastest Lap Each constructor is awarded the same number of points as their best placed rider in each race.