The 2019 K League 1 was the 37th season of the top division of professional football in South Korea since its establishment in 1983, and the seventh season of the K League 1.
[1][2] Jeonbuk Hyundai Motors were the defending champions.
In the 17th round on 23 June, Pohang Steelers were leading Gangwon FC 4–0 away after 70 minutes, but Gangwon scored five unanswered goals including three in injury time to win 5–4.
Leaders Qualification for Champions League group stage Qualification for Champions League play-off round Qualification for relegation play-offs Relegation to K League 2 Teams play each other twice, once at home, once away.
The exact matches are determined upon the league table at the time of the split.