The 2019 K League 2 was the seventh season of the K League 2, the second-highest division in the South Korean football league system. Its champions could be promoted to the K League 1 the next season, and second, third and fourth-placed team advanced to the promotion playoffs.
Relegated from K League 1
Promoted to K League 1
<small>Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.</small>
Restricting the number of foreign players strictly to four per team, including a slot for a player from AFC countries. A team could use four foreign players on the field each game. Players in bold are players who joined midway through the competition.
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When the first round or semi-final match was finished as a draw, its winners were decided on the regular season rankings without extra time and the penalty shoot-out.
The promotion-relegation playoffs were held between the winners of the 2019 K League 2 playoffs and the 11th-placed club of the 2019 K League 1.
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Busan IPark won 2âÂÂ0 on aggregate and were promoted to the K League 1, while Gyeongnam FC were relegated to the K League 2.
Attendants who entered with free ticket were not counted.