2020 K4 League

The 2020 K4 League is the first season of the K4 League. The K4 League was regarded as the successor to the K3 League Basic, which was abolished in 2019.

Five K3 League Advanced teams, six K3 League Basic teams and two newly-founded teams entered in the inaugural season. The 13 participating teams played each other twice. The top two teams could be directly promoted to the relaunched K3 League, and the third and fourth-placed teams qualified for the promotion play-offs.

First round
The first round of promotion play-offs was contested between the third and fourth-placed teams, and its winners played the 14th-placed team of K3 League in the final (K3 League relegation play-off). Pocheon Citizen withdrew from the play-offs and so Jinju Citizen advanced to the final.

Final
When the match was finished as a draw, both clubs remained in their respective leagues.