| Season | 2021 |
|---|---|
| Dates | 27 February – 31 October 2021[1] |
| Champions | Gimcheon Sangmu (1st title) |
| Promoted | Gimcheon Sangmu |
| Champions League | Jeonnam Dragons (via Korean FA Cup) |
| Matches played | 180 |
| Goals scored | 435 (2.42 per match) |
| Best Player | An Byong-jun |
| Top goalscorer | An Byong-jun (23 goals) |
← 2020 2022 → | |
The 2021 K League 2 was the ninth season of the K League 2, the second-tier South Korean professional football league. The champions and the winners of the promotion play-offs could be promoted to the K League 1.