The women's eight event at the 2020 Summer Olympics took place from 24 to 30 July 2021 at the Sea Forest Waterway.

[1] Seven nations were represented with one boat each; 56 rowers and 7 coxswains competed.

Each National Olympic Committee (NOC) is limited to a single boat in the event.

There were seven qualifying places in the women's eight:[2] The event was originally scheduled to start on 25 July 2021, but a poor weather forecast for 26 July resulted in a revised regatta programme, with the heats for the eight moving to the previous day.

[1][5] All times are Japan Standard Time (UTC+9) Five nations qualify for the repechage; the top four qualify for the final.