Kim Jong-Seo (Korean: 김종서; born 23 February 1965) is a South Korean rock musician. He debuted in 1985 as part of the band Boohwal. After Boohwal, Kim Jong-Seo was part of several rock bands, among others: Sinawe, Charisma (카리스마), and Little Sky (작은 하늘). He has been a solo act since 1992, which saw the release of his first solo album Rethona. He contributed to the first, second and fourth albums by Seo Taiji and Boys.

He has released 19 solo albums, and is also Seoul's Ambassador for Environment. His single, "Star's Story" (별 이야기) talks about how we used to be able to see stars at night, but not anymore in big cities. Through this song which was jointly produced with another former member of Buhwal, he calls for people to return the clean environment to our next generation. He was also invited to perform in United Nations Anniversary on 23 June 2009 in New York City.