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 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Withdrawn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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