The 2021 World Rugby Women's Sevens Series was a planned series of rugby sevens tournaments for national women's rugby sevens teams that was cancelled due to impact of the COVID-19 pandemic. Instead of an official season of the Women's Sevens Series, two invitational "Fast Four" tournaments were played in Canada.
Following the cancellation of all official tournaments scheduled for the 2021 series, two invitational events were contested by the following teams:
Mexico replaced France, withdrew late due to travel issues.
In July 2021, four tournaments had been planned for the women's tour but all were subsequently cancelled due to the impact of the COVID-19 pandemic.
Two invitational tournaments were played instead: