2018 Pirelli World Challenge

The 2018 Pirelli World Challenge is the twenty-ninth season of the Pirelli World Challenge. Patrick Long is the defending champion in the highest class, the GT class. It is the second season sanctioned by the United States Auto Club. The season began on 9 March in St. Petersburg and will end on 2 September at Watkins Glen. It is the first season of the new TCR class, while the TCB class has been removed from the series.

On 17 November 2017, WC Vision announced the 2018 calendar. Circuit of the Americas will be the SprintX season opener instead of Virginia. Mid-Ohio and Sonoma were dropped from the schedule in favor of Portland and Watkins Glen. Laguna Seca, which played host for the Touring Car classes season finale weekend in 2017, will not return to the series.

Championship points were awarded for the first twenty positions in each race. The pole-sitter also received one point with the exception of the GTA and GTSA classes. Entries were required to complete 50% of the winning car's race distance in order to be classified and earn points.

Bold – Pole position
Italics – Fastest Lap

Only those manufacturers who are SCCA Pro Racing corporate members were eligible to receive points toward the Manufacturers' championship. Points were awarded based on finishing positions as shown in the chart below. Only the highest finishing car of each eligible manufacturer earned points for its finishing position.

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