JJ or jj may refer to:
Wayne Lim Jun Jie (simplified Chinese: 林俊杰; traditional Chinese: 林俊傑; pinyin: Lín Jùnjié; born 27 March 1981), better known by his stage name JJ Lin, is a Singaporean singer, songwriter, record producer, and actor.
J.J Rendón on Facebook
JJCC (pronounced J-J-C-C; Hangul: 제이제이씨씨) is a six-member South Korean hip hop boy band formed under the management of Jackie Chan Group Korea.
JJK Jyväskylä (JJK) is a Finnish football club, based in Jyväskylä. It currently plays in the Finnish second highest league Ykkönen.
Jyrki Juhani Järvilehto (Finnish pronunciation: [ˈjyrki ˈjærvilehto]; born 31 January 1966 in Espoo), better known as "JJ Lehto", is a Finnish racing driver.
John Joseph Feild (born 1978), known professionally as JJ Feild, is a British-American film, television and theatre actor.
James Edward "JJ" Hickson, Jr. (born September 4, 1988) is an American professional basketball player.
JJ Project (Korean: 제이제이 프로젝트) is a South Korean duo, consisting of JB and Jinyoung. They were formed by JYP Entertainment and released their first single "Bounce" in May 2012. They debuted as a part of Got7 in January 2014.