The term Lock may refer to several subjects in the Kingdom Hearts series:
- The Lock-On feature
- Lock, one of Oogie Boogie's henchmen, or one of the battles against him.
- The Lock, the area in Olympus Coliseum.
- Lock-On Gummi, such as the Thunder-G, weapon Gummis that can home in on targets.
- Shotlock, an ability available in Kingdom Hearts Birth by Sleep.