The 2020–21 Sheffield Shield season was the 119th season of the Sheffield Shield, the domestic first-class cricket competition in Australia. On 26 June 2020, Cricket Australia confirmed all the squads for the 2020–21 domestic cricket season. Cricket Australia also confirmed that the tournament would use the Kookaburra ball for all the matches, after using the Duke ball since the 2016–17 season. New South Wales were the defending champions.