K4 League
| Organising body | Korea Football Association |
|---|---|
| Founded | 2020 |
| Country | South Korea |
| Number of clubs | 13 |
| Level on pyramid | 4 |
| Promotion to | K3 League |
| Relegation to | K5 League (from 2027) |
| Domestic cup | Korean FA Cup |
| Current champions | Dangjin Citizen (2025) |
| Most championships | Paju Citizen Pocheon Citizen Goyang KH Yeoju FC Jeonbuk Hyundai Motors B Dangjin Citizen (1 title each) |
| Broadcaster(s) | Naver Sports STN Sports Afreeca TV |
| Website | kfa.or.kr (in Korean) |
| Current: 2026 K4 League | |
The K4 League (Korean: K4리그) is the fourth-highest division in the South Korean football league system. It is regarded as the successor to the K3 League Basic, the second division of amateur K3 League founded in 2017.
Since 2021, Korea Football Association has allowed reserve teams of the K League to join the K4 League.