The K4 League () 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.
Competition format All participating clubs play home and away season in the K4 League. The promotion and relegation system exists between the K3 League and the K4 League, but does not exist between the K4 League and the amateur K5 League, although there are plans to implement it by 2027.
For the 2025 season, the winner of the league will be crowned champions without a playoff and gain automatic promotion. The 2nd-placed team may gain promotion via a two-game playoff series against the 14th-place team in the 2025 K3 League.
Also for the 2025 season, and following the example of K League, match day squad lists have increased from 18 to 20 players. At least three players must be Korean nationals, aged 23 or younger, and at least one of the three must be in the starting eleven. The Asian player quota has been removed, and teams may now include 4 foreign players of any nationality.
K4 League teams are allowed to recruit professional players who choose to do social service instead of military service.
Clubs Current clubs Team City Stadium Manager First season Current spell Seasons Last title Geoje Citizen Geoje Geoje Stadium Song Hong-sub20212021–6— Geumsan Insam Geumsan County Geumsan Sports Complex Lee Young-min20262026–1 (debut)— Gijang United Gijang County Jeongwan Sports Healing Park Choi Jin-han20252025–2— Haman FC Haman County Haman Public Stadium Oh Hwi-seong20262026–1 (debut)— Jecheon Citizen Jecheon Jecheon Stadium Han Sang-gu20262026–1 (debut)— Jincheon HR Jincheon County Saenggeo-Jincheon Sports Complex Yoo Sang-soo20262026–1 (debut)— Jinju Citizen Jinju Jinju Stadium Lee Chang-yub20202020–7— Namyangju FC Namyangju Namyangju Stadium Kim Sung-il20242024–3— Pyeongchang United Pyeongchang Pyeongchang Stadium Shin Gi-dong20212021–6— Pyeongtaek Citizen Pyeongtaek Sosabeol Reports Town Yoon Sang-chul20222022–5— Sejong SA Sejong Sejong Central Park Soccer FieldSejong Civic Stadium Kim Jong-pil20252025–2— Seoul Jungnang Seoul Jungnang Public Ground Kim Beom-soo20202020–7— Seosan Pioneer Seosan Seosan City Stadium Lee Jung-jae20262026–1 (debut)—
Suspended clubs Team City Stadium Manager First season Current spell Seasons Last title Seoul Nowon United FC Seoul Nowon Madeul Stadium2007-20242027–18— Yangju Citizen Yangju Yangju Stadium Oh Hwi-seong——0—
Former clubs The following clubs are not in the K4 League as of the 2026 season.
Club Last season ReasonPaju Citizen2020Promoted to K3 LeagueUlsan CitizenPocheon Citizen2021Siheung CitizenYangpyeong FC2022Chuncheon CitizenYeoju FC2023Jeonbuk Hyundai Motors B2024Dangjin Citizen2025Icheon Citizen2020DissolvedGoyang Citizen2021FC Namdong2022Goyang KHBusan IPark Futures2023Gangwon FC BGoyang HappinessDaejeon Hana Citizen B2024Jeonju CitizenFC SejongSeoul Nowon UnitedYeoncheon FC2025Daegu FC B
Champions Champions by season Season Champions Runners-up2020 Paju Citizen Ulsan Citizen2021 Pocheon Citizen Siheung Citizen2022 Goyang KH Yangpyeong FC2023 Yeoju FC Daegu FC B2024 Jeonbuk Hyundai Motors B Daejeon Hana Citizen B2025 Dangjin Citizen Namyangju FC2026
Performance by club Club Champions Runners-up Seasons won Seasons runner-up Paju Citizen 1 0 2020— Pocheon Citizen 1 0 2021— Goyang KH 1 0 2022— Yeoju FC 1 0 2023— Jeonbuk Hyundai Motors B 1 0 2024— Dangjin Citizen 1 0 2025— Ulsan Citizen 0 1— 2020 Siheung Citizen 0 1— 2021 Yangpyeong FC 0 1— 2022 Daegu FC B 0 1— 2023 Daejeon Hana Citizen B 0 1— 2024 Namyangju FC 0 1 — 2025
See also K3 League K3 League (2007–2019) South Korean football league system
References
External links Official website at KFA