Abstract: A portable support cushion includes a cushion body, a cushion cover, and a support pouch. The cushion cover surrounds the cushion body so as to enclose the cushion body therein. The support pouch is coupled to the cover and is changeable between an expanded arrangement and a collapsed arrangement. The support pouch comprises an elastic material. In the expanded arrangement, the support pouch is stretched and arranged around a cushion support such that elastic force of the elastic material causes the support pouch to grasp the cushion support to mount the support cushion on the cushion support, which may be a toilet seat lid. The cushion may be used on either surface of a toilet seat lid or as a lower body support on a floor surface.