The 1964 Grand Prix motorcycle racing season was the 16th F.I.M. Road Racing World Championship Grand Prix season. The season consisted of twelve Grand Prix races in six classes: 500cc, 350cc, 250cc, 125cc, 50cc and Sidecars 500cc. It began on 2 February, with United States Grand Prix and ended with Japanese Grand Prix on 1 November.

Stanley Michael Bailey Hailwood, was an English professional motorcycle racer and racing driver. He is regarded by many as one of the greatest racers of all time. He competed in the Grand Prix motorcycle world championships from 1958 to 1967 and in Formula One between 1963 and 1974. Hailwood was known as "Mike The Bike" because of his natural riding ability on motorcycles with a range of engine capacities.