2021 establishments in South Korea

South Korean girl group

Tri.be (; ; stylized as TRI.BE), is a South Korean girl group formed in 2021 by TR Entertainment and Universal Music Group. The group consists of six members: Songsun, Kelly, Hyunbin, Jia, Soeun, and Mire. The group debuted on February 17, 2021, with the release of their debut single album Tri.be Da Loca. Originally as seven members, former member Jinha left the group due to poor physical health reasons.

Lightsum (, stylized in all caps) is a South Korean girl group formed by Cube Entertainment. The group is composed of six members: Sangah, Chowon, Nayoung, Hina, Juhyeon, and Yujeong. Originally an eight-piece ensemble, members Huiyeon and Jian departed the group in October 2022. The group debuted on June 10, 2021, with the release of their debut single album, Vanilla.

Billlie (; stylized as Bi11lie or Billlǃə) is a South Korean girl group formed by Mystic Story. Billlie debuted on November 10, 2021, with the extended play (EP) The Billage of Perception: Chapter One. The group originally consisted of six members: Moon Sua, Suhyeon, Haram, Tsuki, Siyoon and Haruna. A seventh member, Sheon, later joined the group.

South Korean band

Epex (; stylized in all caps) is a South Korean boy band formed and managed by C9 Entertainment. The group consists of seven members: Wish, Mu, A-Min, Baekseung, Ayden, Yewang, and Jeff. Originally an eight-member group, Keum departed in November 2025. They debuted on June 8, 2021, with their first extended play (EP) Bipolar Pt.1: Prelude of Anxiety.

South Korean boy band

South Korean girl group

South Korean boy group

South Korean boy group

South Korean girl group

South Korean boy band

Ciipher () is a South Korean boy band created by South Korean singer Rain under R.A.I.N. Company. The group consisted of three members: Hwi, Hyunbin, and Keita. Originally a seven-piece ensemble, members Tan, Tag, Dohwan, and Won left the group on August 9, 2023. They debuted on March 15, 2021, with the extended play (EP) I Like You.

South Korean boy group

South Korean boy group

BugAboo (; , commonly stylized as bugAboo) was a South Korean girl group formed and managed by A Team Entertainment. The group was composed of six members: Eunchae, Yoona, Rainie, Cyan, Choyeon, and Zin. The group made their debut on October 25, 2021, with the release of their eponymous single album. After a year and two months of activities, the group officially disbanded on December 8, 2022.

South Korean entertainment company

Blitzers (, stylized in all caps) is a South Korean boy band formed by Wuzo Entertainment in 2021. The group consists of six members: Jinhwa, Juhan, Sya, Chris, Lutan, and Wooju. Originally a septet, Go_U left the group in January 2024. The group debuted on May 12, 2021, with the EP Check-In. In May 2024, the group appeared on the 17th series of ''Britain's Got Talent'', where they finished as semi-finalists.

Ichillin' (; stylized as ICHILLIN') is a South Korean girl group formed by KM Entertainment. The group is currently composed of seven members: Jiyoon, E.Ji, Jackie, Joonie, Chaerin, Yeju and Chowon. Former member Sohee left the group in July 2022. The group made their debut on September 8, 2021, with the digital single "Got'Ya".

South Korean women's professional volleyball team

government agency in South Korea

South Korean music industry achievement awards

South Korean boy group

South Korean virtual idol group

South Korean boy band

South Korea Virtual Idol