Enclosed, collapsible and shippable disposable animal litter box which can be shipped without loss of animal litter pre-filled in the litter box, and which can be collapsed by the user for disposal after use, thus resealing the box so that used litter and animal waste are prevented from escaping the box. Litter box includes a top, bottom, left side, right side, front, and rear of sheet material with a litter tray for holding animal litter. Various sides are hingedly attached to each other for shipping, opening up by the user into an enclosed use position for the animal, and then for being closed into a disposal position after use. An animal entryway is provided. Entryway includes a removable seal for sealing entry for preventing litter from escaping when litter box is in collapsed position during both shipping of clean litter and discarding of used litter.