The women's 20 kilometres walk event at the 2020 Summer Olympics took place on 6 August 2021 in Sapporo.

[1] Approximately 60 athletes has qualified; the exact number depended on how many nations use universality places to enter athletes in addition to the number qualifying through time (one universality place was used in 2016).

[2] The actual number of participants was 58 walkers, and the winner was Antonella Palmisano of Italy.

Due to the COVID-19 pandemic, the period was suspended from 6 April 2020 to 30 November 2020, with the end date extended to 29 June 2021.

[2][4] In July 2020, World Athletics announced that the suspension period would be lifted for the road events (marathons and race walks) on 1 September 2020.