The 2021 WK League was the 13th season of the WK League, the top division of women's football in South Korea. The regular season ran from 26 April to 9 November 2021 (originally until 5 October, but was delayed because of the COVID-19 pandemic in South Korea).
Due to the COVID-19 pandemic, the total amount of rounds were reduced from 28 to 21 (same as the previous season).
The total number of foreign players was restricted to three per club, including a slot for a player from the Asian Football Confederation countries. Boeun Sangmu were not allowed to sign any foreign players due to their military status.
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Incheon Hyundai Steel Red Angels won 2âÂÂ1 on aggregate.