The 2020 Pirelli Super Taikyu Series was the twenty-ninth season of the Super Taikyu Series endurance racing championship. It began with the Fuji Super TEC 24 Hours at Fuji Speedway, which was postponed to 5-6 September due to the effects of the COVID-19 pandemic. It ended on 13 December at Autopolis, after five out of six scheduled rounds.
Mercedes-AMG Team Hirix Racing won the championship in the series' GT3 category, known as ST-X, with a Mercedes-AMG GT3 Evo. It was the team's first and only season in Super Taikyu.
This was the third and final year of Pirelli's contract as the series' official tyre supplier, to be replaced by Hankook Tire beginning in 2021.