Abstract: A litter bag hanger for supporting a conventional plastic bag in an open position within a vehicle or under other structures. The inventive device includes a base member, an adhesive strip attached to the upper surface of the base member, a first arm extending from the base member, a pair of first notches within the first arm, a second arm extending from the base member, and a pair of second notches within the second arm. The first notches and the second notches are pear shaped with the narrow end within the perimeter of the first arm and second arm respectively. The first notches and the second notches receive the bag handles of the plastic bag thereby supporting it in a substantially open position. The adhesive strip is attachable to the under surface of a dashboard, countertop, desk, cabinet, or table. The first arm and the second arm are angled downwardly from the base member for allowing easy attachment and removal of the bag handles from the first notches and second notches.