| Competition: | WK League |
| Season: | 2021 |
| Dates: | 26 April – 9 November 2021 |
| Matches: | 84 |
| Winners: | Incheon Hyundai Steel Red Angels (9th title) |
| Total Goals: | 253 |
| League Topscorer: | Josée Nahi (15 goals) |
| Biggest Home Win: | Incheon 7–0 Seoul |
| Biggest Away Win: | Boeun 0–6 Gyeongju |
| Highest Scoring: | Incheon 7–0 Seoul |
| Longest Wins: | 9 matches Gyeongju |
| Longest Unbeaten: | 10 matches Incheon |
| Longest Winless: | 18 matches Changnyeong |
| Prevseason: | 2020 |
| Nextseason: | 2022 |
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).[1]
Due to the COVID-19 pandemic, the total amount of rounds were reduced from 28 to 21 (same as the previous season).[2]
| Team | City | Stadium | Capacity | data-sort-type="number" | Position in 2020 |
|---|---|---|---|---|---|
| Boeun Public Stadium | 6,000 | 8th place | |||
| Changnyeong Sports Park | 2,500 | 5th place | |||
| Gyeongju Football Park | 650 | Runners-up | |||
| Hwacheon Sports Park | 3,000 | 4th place | |||
| 5,078 | Champions | ||||
| Sejong Central Park | 1,000 | 6th place | |||
| 15,511 | 7th place | ||||
| Suwon UDC | 11,808 | 3rd place |
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.
| Club | Player 1 | Player 2 | AFC player | |
|---|---|---|---|---|
| Changnyeong WFC |  Nanase Kiryu | Aya Shimojo | ||
| Gyeongju KHNP |  Josée Nahi | Ines Nrehy | Asuna Tanaka | |
| Hwacheon KSPO | Fumina Katsurama |  Thays Ferrer | Natsuki Yoshimi | |
| Incheon Hyundai Steel Red Angels |  Eli del Estal | |||
| Sejong Sportstoto | ||||
| Seoul WFC | ||||
| Suwon UDC | Sawako Yasumoto | Naoko Sakuramoto | Mebae Tanaka |
| Rank | Player[3] | Club | Goals | |
|---|---|---|---|---|
| 1 | Josée Nahi | Gyeongju KHNP | 15 | |
| 2 | Ines Nrehy | Gyeongju KHNP | 11 | |
 Son Hwa-yeon | Incheon Hyundai Steel Red Angels | |||
| Moon Mi-ra | Suwon UDC | |||
| 5 | Yeo Min-ji | Gyeongju KHNP | 9 | |
| Choi Yoo-jung | Incheon Hyundai Steel Red Angels | |||
| 7 | Yoo Young-a | Seoul WFC | 8 | |
| 8 | Thays Ferrer | Hwacheon KSPO | 7 |
----Incheon Hyundai Steel Red Angels won 2–1 on aggregate.