2004 in South Korean music

The following is a list of notable events and releases that happened in 2004 in music in South Korea.

Debuting groups

 * Garion
 * M. Street
 * Rumble Fish
 * SG Wannabe
 * The TRAX
 * V.O.S
 * WA★DISH
 * Wanted

Solo debuts

 * Bill Stax
 * Chungja
 * E Sens
 * Humming Urban Stereo
 * Illson
 * Jang Yoon-jeong
 * Kebee
 * MayBee
 * Outsider
 * Paloalto
 * Song Seung-heon
 * Lee Seung-gi
 * Taebin
 * Tei
 * Tony Ahn
 * Younha

Reformed groups

 * N.EX.T
 * R.ef

Disbanded groups

 * Bulldog Mansion
 * Isak N Jiyeon
 * K'Pop
 * R.ef
 * jtL