Jeju United

The club was founded on 17 December 1982 as Yukong FC, becoming the second professional football club to be established in South Korea. The club's mascot was an elephant and the team became known as the Yukong Elephants. It was owned and financially supported by the Sunkyoung Group's subsidiary, Yukong (currently SK Group's "SK Energy"), along with Seoul, Incheon, and Gyeonggi as its franchise. Yukong FC was a founding member of the Korean Super League, South Korea's first professional football league and forerunner to the K League. Yukong Elephants won the league championship on only one occasion, in 1989.

When the Super League was established there was no home and away system, but following its implementation in 1987, Yukong FC was initially based within the Seoul Metropolitan Area. From 1990, the club shared Dongdaemun Stadium in Seoul with Ilhwa Chunma and LG Cheetahs. In 1992, the three clubs even allowed spectators to use their club memberships to watch each other's home matches.

As part of the K League's decentralization policy, in 1995 the Seoul government gave an eviction order to the three clubs based in Seoul (Yukong Elephants, LG Cheetahs and Ilhwa Chunma). However, they guaranteed that if clubs built a football-specific stadium in Seoul, they could have a Seoul franchise and return to Seoul. As a result, the three clubs were forced to move their home base from Seoul to other cities.

In 1996, Yukong moved to the city of Bucheon, a satellite city of Seoul. Mid-way through the 1997 season, the club re-branded itself as Bucheon SK. Because the city of Bucheon lacked a stadium, they used the Mokdong Stadium in Seoul until 2000. At the start of the 2001 season, the team moved to the 35,545-capacity Bucheon Leports Complex. In February 2006, Bucheon SK announced their move to Jeju without any fore notice, and renamed as Jeju United FC.

On 3 November 2007, head coach Jung Hae-seong announced his resignation after accepting the position of assistant coach for the South Korea national team. The club stated that they intended to appoint a foreign manager as his replacement. In January 2008, Artur Jorge was appointed as the new head coach. Artur's emphasis on passing play and entertaining football was well received by fans; however, the team finished 10th in the 2008 K League season and remained in the lower mid-table throughout the 2009 K League season. As a result, on 14 October 2009, he announced his resignation before the end of the season, and assistant coach Cho Jin-ho took over as interim manager. He was replaced shortly afterwards by former under-17 national team coach Park Kyung-hoon.

The club finished as runners-up in the 2010 season, allowing them to enter the 2011 AFC Champions League, where they were eliminated in the group stage. The club further qualified for the competition in its 2017 and 2018 editions, making it to the knockout stage in the former before being narrowly knocked out by eventual champions Urawa Red Diamonds in a match where three Jeju players were controversially sent off.

At the beginning of the 2019 season, the team struggled with poor performances. As a result, they parted ways with head coach Jo Sung-hwan, who had led the team for nearly five years, and appointed Choi Yun-kyum as his successor. During the mid-season, the club attempted to turn things around by signing new players such as Yun Il-lok and Choi Kyu-baek, while Yoon Bit-garam returned to the team after completing his military service. However, despite these efforts, the team finished at the bottom of the league standings and was relegated to the second division for the first time since its establishment.

The club received promotion back to the top flight the following year by finishing first in the 2020 K League 2 season.

In 2025, the club rebranded as Jeju SK FC, reflecting a stronger commitment from the parent company SK Group.