A wall-mounted, vertical holder, organizer and dispenser for pet waste bag rolls. Pet waste bag rolls come in standardized sizes wound about a spool, each bag separated from the next by a serrated transversal line. These rolls can be fed horizontally from the top of the dispenser to remain held and organized in the dispenser in a stacked configuration. The dispenser facilitates a bag being separated from the bottom-most roll, pulled through a wedge and chute located near the base on the front of the dispenser, and torn off for use without dislodging the bags from the dispenser or the dispenser from the wall. The wedge holds the next bag in the chute, ready for next use.