The 2021 Stardom Cinderella Tournament (スターダムシンデレラトーナメント2021, Sutādamushindereratōnamento 2021), was the seventh annual professional wrestling single-elimination tournament promoted by World Wonder Ring Stardom which took place beginning with April 10 and culminating on June 12 in the Ota City General Gymnasium. The tournament expanded out of the normal single night format to instead be determined over two separate dates with a limited attendance due in part to the ongoing COVID-19 pandemic at the time.