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.

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
 * Gyeongnam FC
 * Jeju United

Promoted to K League 1
 * Gwangju FC
 * Busan IPark

Newly joined
 * Chungnam Asan

Withdrawn
 * Asan Mugunghwa

Locations
Hana Financial Group took over Daejeon Citizen, and renamed the team Daejeon Hana Citizen.

Personnel and sponsoring
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Foreign players
Restricting 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.

Promotion play-offs
The first round was contested between the third and fourth-placed teams, and the runners-up played the winners of the first round in the final. When the matches were finished as draws, their winners were decided on the regular season rankings without extra time and penalty shoot-outs.

Final
Suwon FC was promoted to K League 1.

Annual awards
The 2020 K League Awards was held on 30 November 2020.