The 2021 W Series was the second season of the W Series motor racing championship, replacing the 2020 season after it was cancelled due of the COVID-19 pandemic. The championship was exclusively open to female racing drivers as a Formula Regional-level racing series in support of the 2021 Formula One World Championship.

W Series was an all-female single-seater racing championship. It was held over a total of three seasons in 2019, 2021 and 2022 before the championship fell into administration and later liquidated, with a planned season in 2020 cancelled due to the COVID-19 pandemic. All three editions were won by Jamie Chadwick.