The 1998 FIA Sportscar Championship season was the 2nd season of International Sportscar Racing Series (later known as the FIA Sportscar Championship). It was a series comprised of sportscar style prototypes broken into two classes based on power and weight involvement, called SR1 and SR2, as well as a class comprised of hillclimb-style sportscars, called CN. It began on April 13, 1998 and ended December 6, 1998 after 8 races.