2020 K League 2
The 2020 K League 2 was the eighth 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. The second, third and fourth-placed teams qualified for the promotion play-offs.
On 24 April 2020, the K League Federation confirmed that they reduced the number of matchdays to 27.
Teams
Team changes
The Asan government made new football club Chungnam [Asan FC|Chungnam Asan] to replace its former club Asan Mugunghwa, which was dissolved before the season.Relegated from K League 1
Promoted to K League 1
Newly joined
Withdrawn
Locations
Hana Financial Group took over Daejeon Citizen, and renamed the team Daejeon Hana Citizen.| Team | City/Province | Abbreviation |
| Ansan Greeners | Ansan | Ansan |
| Bucheon FC 1995 | Bucheon | Bucheon |
| Chungnam Asan | Asan | Chungnam Asan |
| Daejeon Hana Citizen | Daejeon | Daejeon |
| FC Anyang | Anyang | Anyang |
| Gyeongnam FC | Gyeongnam | Gyeongnam |
| Jeju United | Jeju | Jeju |
| Jeonnam Dragons | Jeonnam | Jeonnam |
| Seoul E-Land | Seoul | Seoul E |
| Suwon FC | Suwon | Suwon FC |
Personnel and sponsoring
| Team | Manager | Kit manufacturer | Main sponsor | ||||||||||||
| Ansan Greeners |  Foreign playersRestricting the number of foreign players strictly to five per team, including a slot for a player from AFC and ASEAN countries. A team could use four foreign players on the field each game.North Korean player An Byong-jun was deemed as a native player in K League by South Korean nationality law and passport. Players in bold are players who join midway through the competition.
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