Abstract: A wall-mounted pet waste bag dispenser comprising a hollow body defining an interior space and a dispensing opening. The body, formed of a lightweight and durable plastic material, includes a plurality of ribs disposed in a lower portion of the interior space to support multiple rolls of pet waste bags and prevent jamming during dispensing. A plurality of stoppers in an upper portion of the interior space prevent the rolls from falling forward out of the body. The dispenser incorporates a core removal system comprising a plurality of apertures disposed on an end of the body, allowing empty roll cores to be easily pushed out. The interior space accommodates up to four standard-size rolls, and the dispenser includes a hingedly attached lid, an oval-shaped aperture for easy bag dispensing, and a versatile mounting system.