K-pop Generations Explained: 1st-5th Gen Timeline

K-pop generations sort idols by debut era. Wikipedia's history of Korean idols dates the 1st from 1996, the 2nd from 2003 and the 3rd from 2012; the 4th starts around 2018 or 2020, and debuts since 2023 are often called 5th generation, unofficially (Korea Times, 2025). Of our 98 acts, 72 carry a label (October 2026).

K-pop generations timeline

A generation is named for when its idols debuted, not for when they were popular. The start years below are the ones our sources give most often, and each row names its sources.

Why the boundaries are debated

No official body defines the generations, and the edges move with the source. A Korea JoongAng Daily fact-check (July 2023) found no firm line between them, only a loose industry habit of giving each decade of debuts since the 1990s its own generation.

Girl groups run on a different clock. Wikipedia's history of Korean idols counts girl groups as 3rd generation only from their 2014 debuts, because many earlier ones broke up after a 2009 rule capped exclusive contracts at seven years, and it calls some girl groups that debuted from 2010 to 2013 generation 2.5.

The 4th generation has two start dates. Industry experts largely date it from the change the pandemic brought in 2020, while others place it around 2018 (Korea Times, 2025). That leaves the groups that debuted in 2018 and 2019 on the line, which is why our table marks them as attributed or contested.

The 5th generation is the newest and least settled label. It came from Mnet's audition show Boys Planet, which billed ZEROBASEONE as a 5th generation boy group in 2023, and it is not official (Korea JoongAng Daily, July 2023). The Korea Times (2025) reports that some critics see the 4th generation as still going, that in-between terms such as 3.5 and 4.5 generation are in use, and that a Japanese group, Cosmosy, called itself 6th generation when it debuted on 31 December 2024 (Korea Times, 2025).

What is 1st generation K-pop?

1st generation K-pop is the idol groups that debuted from 1996 to 2002, starting with H.O.T., the first group from SM Entertainment's trainee system (Wikipedia, History of Korean idols). H.O.T., Sechs Kies, S.E.S. and Fin.K.L set the template the later generations followed: about five members with set roles and group choreography fans could copy. No act in our directory is labelled 1st generation.

What is 2nd generation K-pop?

2nd generation K-pop covers the idols that debuted from 2003 to 2011, from TVXQ to BIGBANG and Girls' Generation (Wikipedia, History of Korean idols; Korea Times, 2025). Wonder Girls' 2007 hit "Tell Me" set off the boom, and groups grew bigger, split into units and became regulars on variety shows. In our directory, labelled 2nd generation: BIGBANG, Girls' Generation, KARA, Wonder Girls, 2PM, SHINee, 2NE1, f(x), T-ARA, miss A, SISTAR and Apink.

What is 3rd generation K-pop?

3rd generation K-pop starts with the idols that debuted in 2012, with EXO as its starting point, and it produced worldwide stars such as BTS and BLACKPINK after Psy's "Gangnam Style" (Wikipedia, History of Korean idols; Korea Times, 2025). Social media and self-made video became the way fans found groups, and members from abroad and survival shows became common. In our directory, labelled 3rd generation: BTOB, EXO, BTS, GOT7, MAMAMOO, Red Velvet, WINNER, DAY6, iKON, MONSTA X, SEVENTEEN, TWICE, ASTRO, BLACKPINK, NCT, NCT 127, NCT DREAM, PENTAGON, Dreamcatcher and THE BOYZ.

What is 4th generation K-pop?

4th generation K-pop is the groups that debuted into the pandemic years, led by aespa, LE SSERAFIM and NewJeans; industry experts largely date it from 2020, some from around 2018 (Korea Times, 2025). Online concerts, short-form video and virtual tours shaped how they reached fans (Korea JoongAng Daily, July 2023). In our directory, labelled 4th generation: (G)I-DLE, ATEEZ, Stray Kids, TXT, aespa, ENHYPEN, P1Harmony, STAYC, TREASURE, Billlie, IVE, PURPLE KISS, FIFTY FIFTY, Kep1er, LE SSERAFIM, NewJeans, NMIXX and VIVIZ. Debated between 3rd and 4th: fromis_9, LOONA and ITZY.

What is 5th generation K-pop?

5th generation K-pop is an unofficial name for groups that debuted from 2023, such as ZEROBASEONE, BOYNEXTDOOR, TWS, RIIZE, ILLIT, BABYMONSTER and KISS OF LIFE (Korea Times, 2025). We call these groups the newest wave, and we use the number only where a source uses it for that group. In our directory, in the newest wave: BABYMONSTER, BOYNEXTDOOR, KISS OF LIFE, Loossemble, RIIZE, tripleS, XIKERS, Young posse, ZEROBASEONE, ARTMS, ILLIT, NCT WISH, RESCENE, TWS, Cortis, Hearts2Hearts, KickFlip, Kiiikiii and TUIDE.

When did 5th gen K-pop start?

The 5th generation label started in 2023, when Mnet's Boys Planet billed ZEROBASEONE, the group formed on the show, as a 5th generation boy group (Korea JoongAng Daily, July 2023; Korea Times, 2025). It is not an official era: the Korea Times (2025) notes that some critics think the 4th generation never ended.

What generation is my group?

Every group and solo artist in the kpopquiz.org directory is below, with its debut year, the company that launched it, its generation and how sure that label is. 72 of the 98 acts carry a generation label. Solo artists, the one singer-songwriter duo and groups based outside Korea do not: generations describe Korean idol groups.

How we label each group

• Consensus: the debut year sits inside one generation in every dating our sources give.
• Attributed: a named source places the group, or a note qualifies the label; we name the source.
• Contested: the group sits where the sources disagree and none places it; we show both views.
• Newest: a debut from 2023 on. The 5th generation label is not official, so we give a number only where a source uses it for that group.
• Debut years and agencies come from each act's Wikipedia article. Reviewed 15 October 2026.

What gen is BTS?

BTS is a 3rd generation K-pop group. Source: Korea Times, 2025. BTS debuted in 2013, according to Wikipedia. Play the BTS quiz.

Is Stray Kids 3rd or 4th gen?

Stray Kids is commonly described as a 4th generation K-pop group. Its agency, JYP Entertainment, uses that label. It sits where the line between the 3rd and 4th generations is debated. Sources: Korea JoongAng Daily, October 2023; Korea Times, 2025. Stray Kids debuted in 2018 (formed in 2017), according to Wikipedia. Play the Stray Kids quiz.

What gen is NewJeans?

NewJeans is a 4th generation K-pop group. Sources: Korea Times, 2025; Korea JoongAng Daily, July 2023. NewJeans debuted in 2022, according to Wikipedia. Play the NewJeans quiz.

What gen is ILLIT?

ILLIT belongs to the newest wave of K-pop groups and is often labelled 5th generation, a label that is not official. Sources: Korea Times, 2025; Korea JoongAng Daily, July 2023. ILLIT debuted in 2024, according to Wikipedia. Play the ILLIT quiz.

Test yourself

Play the K-pop blind test one generation at a time: 2nd gen blind test, 3rd gen blind test, 4th gen blind test and 5th gen blind test. The blind test holds 4,200+ songs from 85 groups.

Or name every member of a group, sorted by the generation in our table:

• 2nd generation: Name all SHINee members
• 3rd generation: Name all BTS members, Name all BLACKPINK members, Name all TWICE members, Name all SEVENTEEN members, Name all EXO members, Name all Red Velvet members
• 3rd or 4th generation: Name all ITZY members
• 4th generation: Name all Stray Kids members, Name all aespa members, Name all NewJeans members, Name all (G)I-DLE members, Name all IVE members, Name all LE SSERAFIM members, Name all ATEEZ members, Name all ENHYPEN members, Name all TXT members

Wondering when you became a fan? The K-pop eras timeline helps you find your starting generation.

Sources

• Wikipedia: History of Korean idols
• The Korea Times: Japanese girl group Cosmosy raises questions about K-pop's generational identity, 31 January 2025
• Korea JoongAng Daily: [FACTCHECK] Has K-pop already entered its fifth generation?, 11 July 2023
• Korea JoongAng Daily: Stray Kids sets K-pop milestone with dome stadium tour, 31 October 2023
• Wikipedia: Got7
• Wikipedia: I-dle
• Wikipedia: Ateez
• Each act's Wikipedia article, for its debut year and agency, and Wikidata, for its identifier.

By Louis, founder of kpopquiz.org. Reviewed 15 October 2026. Spotted a mistake? Our corrections log lists every fix.