2023 K4 League

The 2023 K4 League was the fourth season of the K4 League.

Defending champions Goyang KH was dissolved. Runners-up Yangpyeong FC and promotion play-offs winners Chuncheon Citizen were promoted to the K3 League, while Dangjin Citizen were relegated from the K3 League.

The 16 participating teams played each other twice. The top two teams were promoted to the K3 League and the third and foruth-placed teams qualified for the promotion play-offs.

On 3 July 2023, Goyang Happiness were dissolved due to their financial crisis and Korea Football Association decided to nullify Goyang Happiness' results.

Team changes
Relegated from K3 League
 * Dangjin Citizen

Newly joined
 * Busan IPark Futures
 * Goyang Happiness (invalidated)
 * Sejong Vanesse

Promoted to K3 League
 * Yangpyeong FC
 * Chuncheon Citizen

Withdrawn
 * Goyang KH
 * FC Namdong

Final
The promotion play-offs final (K3 League relegation play-off) was contested between the 14th-placed team of K3 League and the winners of the first round.