The 1964 World Sportscar Championship season was the 12th season of FIA 'World Sportscar Championship' motor racing. It featured the 1964 International Championship for GT Manufacturers which was open to Group 3 GT cars and was contested from 16 February 1964 to 11 October 1964 over a twenty race series. Titles were awarded in three engine capacity divisions:
The season also included the 1964 International Prototype Trophy which was open to Prototype cars and was contested over four of the twenty championship races. Titles were awarded to those that were: