Team changes There was generally no promotion or relegation between the K3 League and the
K League 2, but
Hwaseong FC qualified for the K League 2 after succeeding to turn professional at the end of 2024 season. Previously known as Jeonbuk Hyundai Motors B,
Jeonbuk Hyundai Motors N participated after winning the 2024 K4 League.
Daegu FC B were directly relegated as the lowest-ranked team of the 2024 season.
Promoted to K League 2 •
Hwaseong FC Promoted from K4 League •
Jeonbuk Hyundai Motors N Relegated to K4 League •
Daegu FC B Stadiums and locations {{location map+ |South Korea |width=250 |caption=Locations of the 2025 K3 League teams|places= {{location map~ |South Korea |lat=37.3398086 |long=126.7553364 {{location map~ |South Korea |lat=37.755001 |long=126.784478 {{location map~ |South Korea |lat=37.7736304 |long=128.895307 {{location map~ |South Korea |lat=35.931267 |long=129.1318329 {{location map~ |South Korea |lat=36.3171283 |long=127.4305733 {{location map~ |South Korea |lat=37.4779733 |long=127.5849185 {{location map~ |South Korea |lat=37.2932188 |long=127.6222535 {{location map~ |South Korea |lat=35.920490 |long=127.097060 {{location map~ |South Korea |lat=35.5623831 |long=129.3457465 {{location map~ |South Korea |lat=35.2342114 |long=128.6621013 {{location map~ |South Korea |lat=37.8560802 |long=127.6888628 {{location map~ |South Korea |lat=35.1160376 |long=129.0128769 {{location map~ |South Korea |lat=35.2555744 |long=128.8741913 {{location map~ |South Korea |lat=34.8294426 |long=126.3942692 {{location map~ |South Korea |lat=37.8878606 |long=127.1985832
Foreign players The number of foreign players was restricted to three per team, or four per team if one player was from an
AFC country. ==League table==