[1] The regular season was scheduled to begin on 29 February and to end on 4 October,[2] but was postponed until 8 May due to the COVID-19 pandemic.

[3][4][5] On 24 April 2020, the K League Federation confirmed that they would adopt a modified plan for the season, reducing the number of matchdays to 27 including five matchdays of each divided final league.

[10] Restricting the number of foreign players strictly to five per team, including a slot for a player from the Asian Football Confederation countries and a slot for a player from the Association of Southeast Asian Nations.

Players in bold were registered during the mid-season transfer window.

Attendants who entered with free ticket are not counted.