Abstract: Jack stands having support arms that automatically rise to meet lifted loads are disclosed herein. According to one embodiment, a jack stand includes a base having a collar, a support arm, a locking mechanism, and a lifting mechanism. The support arm is movable within the collar and has a plurality of teeth defining grooves and ridges. The locking mechanism has a handle and a stopper and is rotatably coupled to the base at an axis of rotation for movement between a first position where the stopper engages at least one of the grooves to restrict the support arm from moving downwardly, and a second position where the support arm is movable upwardly and downwardly. The lifting mechanism is coupled to the base and is in communication with the support arm to automatically raise the support arm relative to the collar when the locking mechanism is moved to the second position.