Its regular season was held from 11 March to 11 November 2023.
The 14th-placed team advanced to the relegation play-off and the bottom team was directly relegated to the K4 League.
Promoted from K4 League Promoted to K League 2 Relegated to K4 League Restricting the number of foreign players strictly to four per team, including a slot for a player from the AFC countries.
The name in bold indicates that the player was registered during the mid-season transfer window.
The relegation play-off (K4 League promotion play-offs final) was contested between the 14th-placed team of K3 League and the winners of K4 League play-off (semi-final).