Abstract: A toggle switch lock includes a main body portion, a pair of switch lock mounting holes, and a switch position aperture. The main body portion is adapted to attach to a toggle switch faceplate having a pair of faceplate mounting holes, such that a first portion of the toggle switch that represents an off or on state abuts the main body portion so as to lock the switch in the state, a second portion of the toggle switch that represents the other state extends through the switch position aperture, and the switch lock mounting holes are aligned with the faceplate mounting holes. The switch lock can be attached in two different orientations relative to the toggle switch. The switch lock can also be embodied in a switch locking faceplate.