Abstract: A portable, collapsible toilet made of a blank of foldable material and having a row of four side-by-side panels (10), (14), (16), (18) connected by three fold lines (48), (50), (52) to define front, rear and opposed side panels. A top panel 12 is secured to the rear panel (18) by a fold line (28) and includes an opening (20) that may be closed by an integral lid (22). When assembled in a rectangular configuration, a plastic bag (96) may be nested between the panels (10), (14), (16), (18) and the top panel (12) closed thereon.