A lockable utility box lid includes at least one aperture therethrough for receiving a fastener. The locking mechanism preferably includes a utility box engagement member coupled to the underside of the utility box lid. The locking mechanism is movable between a locked and unlocked position. A fastener extends through the opening in the utility box lid and engages the locking mechanism. Rotating the fastener in a first direction causes the locking mechanism to assume a first, locked position. Rotating the fastener in a second direction causes the locking mechanism to assume a second, unlocked position. In the locked position the utility box engagement member is engaged with an interior surface of the utility box lid.