
1Punch was a South Korean duo formed by Brave Entertainment in Seoul, South Korea, consisting of One and Punch. They debuted on January 23, 2015, with their single "Turn Me Back" (돌려놔) from the single album The Anthem. The duo ultimately disbanded after One signed with YG Entertainment. Both members debuted as solo artists in 2017.

AKMU (Korean: 악뮤, also known as Akdong Musician is a South Korean sibling duo consisting of Lee Chan-hyuk and Lee Su-hyun who debuted under YG Entertainment in April 2014 with studio album Play after winning SBS' K-pop Star 2.

As One (Korean: 애즈원) was a South Korean R&B girl group consisting of Korean-American singers Lee Min and Crystal. The group debuted in 1999 with the album Day by Day, and released five more albums before announcing their hiatus from the music industry in 2017 with the single, "Goodbye for Now".

Bolbbalgan4 is a South Korean musical act formed by Shofar Music in 2016. They appeared on Superstar K6 in 2014 before signing a contract with their current agency. BOL4 was originally a duo consisting of Ahn Ji-young and Woo Ji-yoon. They debuted with the single "Fight Day" from the mini-album Red Ickle on April 22, 2016. The meaning of 사춘기(思春期) is "puberty" in English. In Korean, the pronunciation of 사(思) is the same as 사(四=4), so the group name is sometimes shortened to Bol4.

CocoSori was a South Korean duo formed by Mole Entertainment. They debuted on January 5, 2016, with the single "Dark Circle". On February 1, 2019, through a direct statement from Mole Entertainment, CocoSori was announced to have disbanded due to internal conflicts with member Coco.

Cultwo (Korean: 컬투) is a South Korean comedy duo consisting of Jung Chan-woo and Kim Tae-gyun. Formed in 1994 as Cult Triple, in 2002, Jung Seong-han left the team. After which, Chan-woo and Tae-gyun renamed the team the current name. Their syndicated talk radio show Cultwo Show, airs via the SBS Power FM since 2006.

Davichi is a South Korean pop duo formed in 2008. The duo consists of vocalists Lee Hae-ri and Kang Min-kyung. Their name, "Davichi", is derived from the Korean phrase "shining over everything".

December was a South Korean duo formed by CS Happy Entertainment in 2009. They debuted on October 27, 2009 with Dear My Lover.

Dynamic Duo is a South Korean hip hop duo that consists of rappers Choiza and Gaeko. They rose to fame with their 2004 debut album, Taxi Driver, which became the best-selling Korean hip hop album ever. They are signed to Amoeba Culture, a hip hop record label that they founded in 2006.

Exo-SC is the second official sub-unit of South Korean-Chinese boy band Exo. Formed by SM Entertainment in 2019, the group is composed of two Exo members: Chanyeol and Sehun. Their debut extended play What a Life was released on July 22, 2019.

Fly to the Sky is a South Korean R&B duo consisting of Brian Joo and Hwanhee. Initially marketed as K-pop idols, the duo later developed a more mature image and became one of the most popular R&B groups in South Korea. The duo has released nine studio albums since its debut in 1999.

GD & TOP is a South Korean duo formed by G-Dragon and T.O.P, the rappers of the K-pop boy band Big Bang in 2010. The release of their first album, GD & TOP (2010) was a commercial success becoming one of the best selling albums of the year in South Korea, and spawning the top-five hits "High High", "Oh Yeah", and "Knock Out" on the Gaon Digital Chart. After a five year hiatus, they released the single "Zutter", which peaked at number two on the Gaon Digital Chart.

H&D (Korean: 한결,도현), is a South Korean duo formed by Pocketdol Studio in 2020. The duo debuted on April 21, 2020, with Soulmate.

Homme (Korean: 옴므) was a South Korean musical duo. The duo was composed of Lee Hyun and Lee Chang-min.

Hyeongseop X Euiwoong is a South Korean duo formed by Yuehua Entertainment in Seoul, South Korea. The duo previously participated in Produce 101 Season 2. They debuted on November 2, 2017, with the single "It Will Be Good".

Hyungdon and Daejun is a South Korean duo under D.I. Music consisting of comedic television personalities Jung Hyung-don and Yoo Dae-jun. They debuted on May 29, 2012, with "Olympic Expressway". They released their first EP, Gangstar Rap Bloom 1, on June 5, 2012.

J Rabbit (제이레빗) is a South Korean acoustic pop female duo under the label friendz.net. They debuted on November 27, 2010 with the single "Take One". The group's name is derived from combining the letter ‘J’ from their matching surname ‘Jung’ and the year of the rabbit, 1987, which they were both born in.

JBJ95 (Korean: 제이비제이구오) is a South Korean duo consisting of Kenta Takada and Kim Sang-gyun. The duo was originally formed and managed by Star Road Entertainment and Hunus Entertainment in 2018, before being exclusively managed by Star Road Entertainment. JBJ95 debuted on October 30, 2018 with the single Home.

Jinusean is a South Korean hip hop duo signed to YG Entertainment. The duo, which is made up of Kim Jin-woo and Noh Seung-hwan, debuted in 1997 and rose to fame with the single, "Tell Me." They are considered pioneers of Korean hip hop.

JJ Project is a South Korean duo, consisting of JB and Jinyoung. They were formed by JYP Entertainment and released their debut single "Bounce" in May 2012. They debuted as a part of Got7 in January 2014.

Jus2 is a South Korean duo consisting of JB and Yugyeom. They were formed by JYP Entertainment and released their first EP, Focus, on March 5, 2019. It is the second Got7 sub unit, after JJ Project.

Kim Heechul & Kim Jungmo was a South Korean pop rock duo formed by SM Entertainment in 2011. The group was composed of Super Junior's Heechul and TraxX's Kim Jungmo. Both members decided to write and compose every song the project group released. They'll continuously release music which they can and want to do, regardless of the genre. Their debut single, "Close Ur Mouth" was released in June 2011 under the name, M&D. In early July 2016, SM Entertainment announced that the duo would return as Kim Heechul & Kim Jungmo (김희철&김정모).

Leessang (Korean: 리쌍) was a South Korean hip hop duo, composed of Kang Hee-gun and Gil Seong-joon ("Gil"). Formed in 2002, the duo has released eight albums to date: two self-titled records in 2002 and 2003, Library of Soul in 2005, Black Sun in 2007, Baekajeolhyeon (백아절현) in 2009, Hexagonal in late 2009, Asura Balbalta in 2011 and Unplugged in 2012. Their last three albums broke numerous records and guided their entry to the mainstream Korean music industry.

Longguo & Shihyun is a South Korean duo formed by Choon Entertainment in Seoul, South Korea. The duo previously participated in Produce 101 Season 2. They debuted on July 31, 2017, with the single "the.the.the". Longguo was a member of fan-made project boy group JBJ, having signed a seven-month contract with the label Fave Entertainment.

MeloMance is a South Korean duo formed by Heaven Company in 2013. They debuted on March 10, 2015, with Sentimental.

MXM is a South Korean duo under Brand New Music that consists of members Lim Young-min and Kim Dong-hyun.

Norazo is a musical male duo from South Korea, known for their eccentric stages and comical lyrics. The two original members were Jo Bin and Lee Hyuk. They were also participants in the musical variety show, Immortal Songs. The duo debuted in 2005. After Lee Hyuk's departure from the group vocalist Won Heum joined as the new member.

Rooftop Moonlight is a South Korean duo formed by Magic Strawberry Sound in Seoul, South Korea. They debuted on January 22, 2010, with Okdal Radio.

Running Man Brothers is a South Korean pop duo, which is named after the South Korean television show Running Man. The group is composed of cast members Kim Jong-kook and Haha and was formed in 2014.

Seenroot was a South Korean musical duo, signed under Kakao M's indie sub-label Mun Hwa In. The pair's debut mini-album was released in 2015. The record's lead single "Sweet Heart" did not see success until two years after its release, when a broadcast jockey sang the song in midst of live streaming and became a viral video. It led the song to peak at number 13 on the national Gaon Digital Chart, where it sold nearly 1.3 million downloads by the end of 2017.

RGP which was formally known as Skull & Haha (Korean: 스컬&하하) is a South Korean duo formed by Quan Entertainment in Seoul, South Korea. They debuted on July 30, 2012, with Ya Man!!.

Crayon Pop is a South Korean girl group formed under Chrome Entertainment in 2012. The group consisted of four members: Geummi, Ellin, Choa, and Way. Their fifth member, Soyul, left the group in 2017.

Super Junior-D&E is the fifth official sub-unit of the South Korean boy band Super Junior. Formed by SM Entertainment in 2011, the group is composed of two Super Junior members: Donghae and Eunhyuk. The duo debuted on December 16, 2011, with their digital single "Oppa, Oppa".

Togeworl is a South Korean folk pop duo, who formed in New Jersey in 2011. They competed in the Superstar K3 singing competition, placing third. The duo went on temporary hiatus in 2013, and vocalist Lim Kim debuted as a solo musician.

Toheart is a South Korean duo formed by Woohyun from Infinite and Key from Shinee in 2014. It is a collaboration between SM Entertainment and Woollim Entertainment.

Trouble Maker is a duo formed by Cube Entertainment in 2011, composed of Hyuna and Jang Hyun-seung.

TVXQ, an initialism for Tong Vfang Xien Qi, is a South Korean pop duo consisting of U-Know Yunho and Max Changmin. They are known as Tohoshinki in Japanese releases, and are sometimes referred to as DBSK, an abbreviation of their Korean name Dong Bang Shin Ki (Korean: 동방신기). Their name roughly translates to "Rising Gods of the East".

VIXX LR is the first official sub-unit of South Korean boy group VIXX formed by Jellyfish Entertainment. Established in August 2015, VIXX LR consists of VIXX's main vocalist Leo and main rapper Ravi. The sub-unit debuted with their first mini album, titled Beautiful Liar on August 17, 2015.

Wink (Korean: 윙크) is a South Korean trot music duo. They debuted on February 12, 2008, with the single "Match Made in Heaven".

Wooseok X Kuanlin (우석X관린) is a South Korean musical duo formed by Cube Entertainment in 2019. The duo debuted on March 11, 2019 with 9801.