The 1988 World Sportscar Championship season was the 36th season of FIA World Sportscar Championship motor racing. It featured the 1988 FIA World Sports Prototype Championship which was open to FIA Group C and Group C2 cars and to IMSA GTP, GTX, GTO and GTU cars. The championship was contested over an eleven race series which ran from 6 March to 20 November 1988.