Abstract: A retractable leash with integrated locking system includes a main body having a plurality of sides that define an interior space. An elongated leash cord extends through an aperture in the main body and is connected to a retractable mechanism that is positioned within the main body. A locking handle assembly is connected to the main body and transitions between an open position and a closed position. The handle assembly includes a fixed section and a movable section that is hingedly secured to the main body. An electronic lock is positioned within the handle assembly and is selectively activated by a biometric sensor. A location module is positioned within the main body, and a light and charging port are positioned along the main body.