South Korea participated in the 2018 Asian Games in Jakarta and Palembang, Indonesia from 18 August to 2 September 2018. It was the 18th appearance of the country at the Asian Games, except the first edition in Delhi. As one of the best competitors at the Games, South Korea's best achievement was in the 2002 Busan, with the acquisition of 96 gold, 80 silver and 84 bronze medals. At the latest edition in 2014 Incheon, the country had collected 79 gold, 71 silver, and 84 bronze medals.
South Korea sent 779 athletes across 39 sports to compete in Jakarta and Palembang. Korean Sport & Olympic Committee (KOC) is aiming to finish second for the sixth consecutive Asian Games with 65 gold medals, fewer than the Incheon Asian Games four years ago. South Korea marched along with North Korea under the Korean Unification Flag at the opening ceremony, and have together fielded unified Korean teams in women's basketball, rowing and canoeing.
The following South Korean competitors won medals at the Games. In the by discipline sections below, medalists' names are bolded.
The following is a list of the number of competitors representing South Korea that participated at the Games:
<sup>*</sup> Oh Jin-hyek and Kang Chae-young took part in the ranking round.
<sup>**</sup> Did not play.<br /> <sup>***</sup> Choi Yong-hee and So Chae-won took part in the ranking round.
FR: Reserved in free routine; RR: Reserved in technical and free routines; TR: Reserved in technical routine.
<sup>*</sup> Did not play.
The following is the South Korea roster for the men's baseball tournament of the 2018 Asian Games. The team of 24 players was officially named on 11 June 2018.
As the defending champion, South Korea men's team drawn in the group A at the competition.
The following is the South Korea roster in the men's basketball tournament of the 2018 Asian Games.
South Korea also set a men's and women's team that competed in the 3-on-3 basketball. The men's team placed in the pool B, and the women's team in the pool D based on the FIBA 3x3 federation ranking.
Korea Basketball Association (KBA) selected four athletes for the men's 3x3 basketball tournament of the 2018 Asian Games.
The following is the South Korea roster in the women's 3x3 basketball tournament of the 2018 Asian Games.
<span style="font-size:95%">Qualification legend: QF=Final; QS=Semifinal</span>
<span style="font-size:95%"> Riders who participated in the heats only and received medals.<br /> Riders who entered the competition but did not participating in any phase of the team event.<br /> Qualification legend: FA=Gold medal final; FB=Bronze medal final</span>
<span style="font-size:95%"> Riders who participated in the heats only and received medals.<br /> Riders who entered the competition but did not participating in any phase of the team event.<br /> Qualification legend: FA=Gold medal final; FB=Bronze medal final</span>
Qualification legend: FA=Gold medal final; FB=Bronze medal final
South Korea men's team were drawn in Group E at the Games, while the women's team in Group A.
South Korea men's team were drawn in group B, while the women's team in group A. The women's team was a champion in the last edition in 2014 Incheon.
South Korea entered the ju-jitsu competition with 1 men's and 1 women's athletes.
South Korea entered four pentathletes (2 men's and 2 women's) at the Games.
South Korea rugby sevens men's team entered the group C at the Games, while the women's team placed in group A.
The following is the South Korea squad in the men's rugby sevens tournament of the 2018 Asian Games.
Head coach: Choi Chang-ryul
The following is the South Korea squad in the women's rugby sevens tournament of the 2018 Asian Games.
Head coach: Cho Sung-lyong
The top four teams will advance to the final round.
South Korea entered their triathletes to compete at the Games.
The following is the South Korean roster in the men's volleyball tournament of the 2018 Asian Games.
Head coach: Kim Ho-chul
The following is the South Korean roster in the women's volleyball tournament of the 2018 Asian Games.
Head coach: Cha Hae-won
Head coach: Kim Jung-yeoul