While the industry of K-pop originates in South Korea, with the rise of the Korean Wave, the demand for Korean pop music has spread globally. As the genre expanded globally, so did the fan culture. This has led to the globalization of Korean pop music. Key aspects of K-pop fan culture include learning choreography, purchasing albums and other merchandise, and engaging with other fans on social media platforms. Many fans even travel internationally to attend concerts or visit South Korea itself, reflecting how K-pop inspires a level of engagement that blends entertainment, community, and lifestyle. K-pop music has taken the world by storm creating a massive fan base in all regions of the world.

Fan culture Many fans travel overseas to see their idols on tour, and tourists commonly visit South Korea from Japan and China to see K-pop concerts. A K-pop tour group from Japan had more than 7,000 fans fly to Seoul to meet boy band JYJ in 2012, and during JYJ's concert in Barcelona in 2011, fans from many parts of the world camped overnight to gain entrance. A 2011 survey conducted by the Korean Culture and Information Service reported that there were over three million active members of hallyu fan clubs.

Bang Si-hyuk, the music industry executive behind BTS, expressed that K-pop idol fans view their idol differently from how music fans view a typical singer. Idol fans want to feel close to and be a part of their idol's lifestyle, even outside of live performances.

An article by The Wall Street Journal indicated that K-pop's future staying power will be shaped by fans, whose online activities have evolved into "micro-businesses." K-pop groups commonly have dedicated fan clubs with a collective name and sometimes an assigned colour, to which they will release merchandise. For example, TVXQ fans are known as 'Cassiopeia,' and their official colour is 'pearl red.' Some of the more popular groups have personalized light sticks for use at concerts; for example, BigBang fans hold yellow crown-shaped light sticks.

Fan clubs sometimes participate in charity events to support their idols, purchasing bags of 'fan rice' in order to show support. The rice bags are donated to those in need. According to Time, for one of BigBang's shows, 12.7 tons of rice were donated from 50 fan clubs around the world. There are businesses in South Korea dedicated to shipping rice from farmers to the venues. Another way that fan clubs show their devotion is by sending lunch to idols during their schedules, and there are catering companies in South Korea specifically for this purpose. Increasingly, fans participate in activism that extends outside of the K-pop community.Lorenz, Taylor; Browning, Kellen; Frenkel, Sheera (June 21, 2020). "TikTok Teens and K-Pop Stans Say They Sank Trump Rally". The New York Times. . Retrieved 2023-02-21.Bruner, Raisa (July 25, 2020). "How K-Pop Fans Actually Work as a Force for Political Activism in 2020". Time. Retrieved 2023-01-31.

A unique feature of K-pop fandom is the "fan chant". When an idol group releases a new song, chants, usually consisting of group members' names, are performed by live concert audiences during non-singing parts of songs.

Obsession

Some idols and idol groups have faced problems from obsessive fans who indulge in stalking or invasive behavior. These fans are known as sasaeng fans (), from the Korean word for 'private life,' which alludes to their penchant for invading the privacy of idols and members of idol groups. There have been accounts of extreme behaviors from fans trying to gain idols' attention. South Korean public officials recognize this as a unique but serious concern.

Some idols have responded towards sasaeng fans, for which some have received backlash; including members of JYJ, Kim Heechul, and Kim Jaejoong.

In response to the issue, a law introduced in February 2016 in South Korea saw the penalty for stalking rise to around US$17,000 as well as a possible two-year jail sentence.

Social media Social media sites such as YouTube, Twitter, and Facebook allow K-pop artists to reach a global audience and to communicate readily with their fans. K-pop fandoms are also active on Instagram, TikTok, Reddit, Tumblr and Twitch. As global online music market revenue approximately doubled from 2014 to 2024 with digital transformation, music consumers around the world are more likely to be exposed to K-pop.

YouTube

Since K-pop started to spread its industry outside South Korea, K-pop artists have set notable records on YouTube. In December 2011, K-pop became the first country-specific genre of music to gain a homepage on YouTube. In December 2012, Psy's music video for "Gangnam Style" became the first YouTube video to receive 1 billion views. On 11 November 2019, girl group Blackpink's music video for "Ddu-Du-Ddu-Du" became the first music video by a K-pop group to reach 1 billion views on the platform. On May 21, 2021, BTS' music video for "Butter" set a record for the most viewed online music video in the first 24 hours, garnering over 108 million views. As of August 2024, "Butter" still holds this record. Youtube shorts also become a trend for K-pop group to advertise and sharing contents to build closer bonds with fans.

X (formerly Twitter) X (formerly Twitter) has also been a significant social media platform for K-pop stars to get connections and promotions. The viral song "Gangnam Style" gained popularity from mentions by prominent Twitter users. Bang Si Hyuk, the producer of BTS, partially attributed the fast growth of their fanbase to social media such as Twitter. On November 13, 2017, BTS became the first South Korean act to reach 10 million followers on Twitter. From 2017 to 2021 Billboard Music Awards, BTS won the award for Top Social Media Artist based on Twitter voting by their fans. According to YeonJeong Kim, the Head of Global Kpop & K-Content Partnerships, over 7.8 billion #KpopTwitter were posted worldwide in 2021, marking a 16% increase from 2020. Fan engagement with K-pop on Twitter remains strong, with multiple idol groups, including BTS, BLACKPINK, and Stray Kids, exceeding 10 million followers.

TikTok Multiple entertainment companies use TikTok to market and promote their artists' music. The "Any Song" dance challenge by rapper Zico garnered 400 million views in less than two months, with around 830,000 videos uploaded featuring the sound. Fifty Fifty's song "Cupid" went viral on TikTok with over 400,000 videos published with the sound. Prior to the TikTok audio, Fifty Fifty were averaging 300,000 monthly listeners on Spotify to over a million.

East Asia Japan Following the lifting of WWII-era restrictions imposed on exchanges and trade between South Korea and Japan in the late 1990s, the first-generation girl group S.E.S became the first South Korean artists to debut in Japan in late 1998, releasing their first Japanese-language album Reach Out in 1999. Young K-pop star BoA had Japanese-language training before her South Korean debut and when she debuted in Japan in 2002 with her first Japanese-language album Listen to My Heart, her South Korean identity was inessential, as her music style and fluency in Japanese led her to be considered a part of J-pop. Listen to My Heart was the first album by a South Korean singer to debut atop the Japanese Oricon Charts and become an RIAJ-certified "million-seller" in Japan. BoA has since released several Japanese albums, most of which have topped the Oricon Charts.

Following BoA's successful Japanese debut, TVXQ debuted in Japan in 2005 under a procedure similar to BoA's. TVXQ did not promote their South Korean identity, and their ballad-style songs fit well into J-pop's typical sound. TVXQ's first and second albums released in Japan were minor successes, peaking on the Oricon Charts at twenty-five and ten respectively. However, on January 16, 2008, TVXQ reached the top of the Oricon Charts with their sixteenth Japanese single "Purple Line", becoming the first South Korean male group to have a number-one single in Japan. They have since had remarkable success with their comebacks. In 2018, they accumulated over 1.2 million people to their concerts, beating Japanese band B'z. Since the start of the Korean Wave, the Japanese market has seen an influx of South Korean pop acts such as Kara, Girls' Generation, 2PM, SS501, Shinee, Super Junior, and BigBang. In 2011, it was reported that the total sales for K-pop artists' increased 22.3% between 2010 and 2011 in Japan. Some Korean artists were in the top 10 selling artists of the year in Japan.

As of 2019, several other K-pop groups have debuted in the Japanese market including Exo, BTS, Got7, Seventeen, iKon, GFriend, Astro, Pentagon, Twice, Monsta X, FT Island, NCT 127 and Blackpink. Many of these groups debut with Japanese versions of their recent Korean releases, then later release original Japanese songs. Many groups such as Twice, NCT 127, and Pentagon also include Japanese members that auditioned in Japan and were brought to South Korea, or came to South Korea in order to become a K-pop singer.

With tensions still remaining between South Korea and Japan, the import of South Korean popular culture has been met with different forms of resistance, in the form of the 'Anti-Korean Wave.' One demonstration against the Korean Wave with roughly 500 participants was broadcast on Japan's Fuji TV to an Internet audience of over 120,000. However, the chairman of the Presidential Council on National Branding cited this resistance as proof of "how successful Korean Wave is." Some argue that this was not a protest against the Korean Wave itself, but rather a broader expression of anti-Korean sentiment targeting the people and nation, rather than its popular culture. In fact, many young Japanese fans have been observed consciously separating their political views from their enjoyment of K-pop, choosing to appreciate the music and entertainment while distancing themselves from anti-Korean political discourse.Ji-Hyun Ahn and E. Kyung Yoon, "Between Love and Hate: The New Korean Wave, Japanese Female Fans, and Anti-Korean Sentiment in Japan," Journal of Contemporary Eastern Asia 19, no. 2 (2020): 179–89, https://doi.org/10.17477/jcea.2020.19.2.179. The Korean Wave has also interested Japanese people to pursue a pop music career by going to South Korea to become K-pop stars.

China

The 1990s saw the rise of K-pop in China through groups like H.O.T., S.E.S., Baby Vox, Shinhwa, and Sechs Kies—sparking China's investment in South Korea's entertainment industry. K-pop artists have achieved considerable success in China since then: in 2005, Rain held a concert in Beijing with 40,000 attendees.K-Pop: A New Force in Pop Music, pp. 67–71 In 2010, the Wonder Girls won an award for the highest digital sales for a foreign artist, with 5 million digital downloads, in the 5th annual China Mobile Wireless Music Awards.