JTK may refer to:

• Ibanez Jet King, a family of electric guitars
• James T. Kirk, a character in the Star Trek media franchise
• Junior Tia-Kilifi (born 1988), New Zealand rugby league player

• Selend
• SELENE2
• Selene 6.23
• Selenean summit
• Selene (Cro character)
• Selene (fish)
• Selene (given name)
• Selene Gomez
• Selene goreensis
• Selenehelion
• Selenenic acid
• Selene peruviana
• Selene setapinnis
• Selene Vigil
• Selene Vigil-Wilk
• Selene Wines
• Selenge erdene-ochir
• Selenge Erdene-Ochir
• Selenge Odkhuu
• Selenge Press
• Selenge River
• Selengiin Odkhüü
• Selenginsky (disambiguation)
• Selen (given name)
• Selenia Aspide