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