| Season | 2020 |
|---|---|
| Dates | 16 May – 5 September 2020 |
| Champions | Gimhae FC (1st title) |
| Relegated | Chuncheon Citizen Jeonju Citizen |
| Matches played | 119 |
| Goals scored | 430 (3.61 per match) |
| Best Player | Choi Yong-woo[1] |
| Top goalscorer | Choi Yong-woo (15 goals)[1] |
| Biggest home win | KHNP 7–0 Yangju |
| Biggest away win | Yangju 0–5 Changwon |
2021 →
| |
The 2020 K3 League was the first season of the K3 League as a semi-professional league. After the 2019 season, the former Korea National League and K3 League Advanced went defunct and rebranded as the K3 League.
Eight National League teams, six K3 League Advanced teams and two K3 League Basic teams entered in the 2020 season.[2] The 16 participating teams were divided into two groups, the top eight and the bottom eight, after playing each other once. Each team played 22 matches including 7 group stage matches. The 15th and 16th-placed teams were directly relegated to the K4 League, and the 14th-placed team advanced to the relegation play-off.[3]