JJK

JJK may refer to:


 * JJK Jyväskylä, a Finnish football team from the city of Jyväskylä
 * John "Julius" Knight, American musician
 * Jesper Kyd, Danish video game composer
 * Jacqueline "Jackie" Joyner-Kersee, American former heptathlon athlete
 * Jujutsu Kaisen, a Japanese manga series by Gege Akutami
 * Jeon Jungkook, the lead singer of K-pop group BTS