The 2021 Super Rugby AU season (branded as Harvey Norman Super Rugby AU for sponsorship reasons) was a professional club rugby union tournament organised by Rugby Australia. Announced on 11 November 2020, the tournament was the second season of Super Rugby AU, featuring the same 5 teams from the inaugural 2020 season, and ran from 19 February to 8 May 2021. The tournament was won by the Reds, who defeated the Brumbies 19–16 in the final at Suncorp Stadium, winning their first Super Rugby AU title, and first Super Rugby competition since 2011.