Abstract: A simple rugged holder for supporting a box of toilet seat covers for use in a portable toilet includes a front, sides, bottom and a mounting flange for attachment to a wall of the portable toilet. The holder is preferably made of molded plastic in one piece, the flange connecting the sides and bottom to define a space within which the box of seat covers is supported. A stiffening member is disposed along a top front edge of the front and serves also to guide the insertion of a box of seat covers into the defined space. The height, width and depth of the space are selected to allow easy insertion of a box of seat covers yet providing a sufficiently firm grip on the box to prevent inadvertent extraction from the holder when users forcefully remove tissue seat covers. An alternative embodiment is made of sheet metal.