K-pop (Korean: 케이팝; RR: keipap), short for Korean popular music, is a form of popular music originating in South Korea as part of South Korean culture. It includes styles and genres from around the world, such as pop, hip hop, R&B, rock, jazz, gospel, reggae, electronic dance, folk, country, disco, and classical on top of its traditional Korean music roots. The term "K-pop" became popular in the 2000s, especially in the international context. The Korean term for domestic pop music is gayo (가요; 歌謠), which is still widely used within South Korea. While "K-pop" can refer to all popular music or pop music from South Korea, the term is often used when referring to artists associated with the entertainment and idol industry in the country, regardless of the genre of music output.

The more modern form of the genre, originally termed "rap dance", emerged with the formation of the hip hop boy band Seo Taiji and Boys, in 1992. Their experimentation with different styles and genres of music and integration of foreign musical elements helped reshape and modernize South Korea's contemporary music scene.

Modern K-pop "idol" culture began in the 1990s, as K-pop idol music grew into a subculture that amassed enormous fandoms of teenagers and young adults. After a slump in early idol music, from 2003, TVXQ and BoA started a new generation of K-pop idols that broke the music genre into the neighboring Japanese market and continue to popularize K-pop internationally today. With the advent of online social networking services and South Korean TV shows, the current spread of K-pop and South Korean entertainment, known as the Korean Wave, is seen not only in East Asia, but also throughout the world, gaining an international audience.

In 2018, K-pop experienced significant growth and became a "power player", marking a 17.9% increase in revenue growth. As of 2019, Korean popular music is ranked at number six among the top ten music markets worldwide according to the International Federation of the Phonographic Industry's "Global Music Report 2019", with BTS and Blackpink cited as artists leading the market growth. In 2020, K-pop experienced a record-breaking year when it experienced a 44.8% growth and positioned itself as the fastest-growing major market of the year.