On 24 April 2020, the K League Federation confirmed that they reduced the number of matchdays to 27.
[2][3] Relegated from K League 1 Promoted to K League 1 Newly joined Withdrawn Hana Financial Group took over Daejeon Citizen, and renamed the team Daejeon Hana Citizen.
Note: Flags indicate national team as has been defined under FIFA eligibility rules.
Leaders, promotion to K League 1 Qualification for promotion play-offs final Qualification for promotion play-offs first round 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.