JK may refer to:
Juan Karlos Labajo (born February 5, 2001), also known as JK is a Filipino singer and actor. He is co-managed by ABS-CBN's Star Magic and MCA Music Inc.
JKT48 (read as "J. K. T. Forty-eight") is an Indonesian idol group whose name is derived from its based city of Jakarta and the Japanese idol group AKB48. Formed in 2011, it is the first AKB48 sister group outside Japan and adopts the concept of "idols you can meet".
JK Tyre & Industries Ltd is an Automotive Tyre, Tubes and flaps manufacturing company based in Delhi, India.
Jalgpalliklubi Tallinna Kalev (Football Club Kalev Tallinn) is an Estonian football club, based in Tallinn, that plays in the Esiliiga, the 2nd level in Estonian football league system.
Jalgpalliklubi Narva Trans, commonly known as Narva Trans, or simply as Trans, is a professional football club, based in Narva, Estonia, that competes in the Meistriliiga, the top flight of Estonian football.
Jalgpalliklubi Sillamäe Kalev, commonly known as Sillamäe Kalev, is a professional football club, based in Sillamäe, Estonia, that competes in the Meistriliiga, the top flight of Estonian football.
Jason King (né Griffiths) and Joel Ross (né Hogg), known professionally as JK and Joel, were a radio presenting duo, best known for hosting the official UK chart on BBC Radio 1 between 2004 and 2007 and presented the CBBC show Hider in the House.