Abstract: A portable dog pen assembly facilitates transport and temporary installation of an enclosure for an animal. The assembly includes a series of panels defining a sheet of material. Tubes are provided including medial tubes and end tubes. Each medial tube is positioned between an associated adjoined pair of the panels and each end tube is coupled to and extends along a free end of the sheet of material. Looped ends of stabilizer bars are alignable with a selectable one of the tubes to extend each stabilizer bar along a top edge of an associated one of the panels. Each of a plurality of posts is insertable through an associated one of the looped ends and the tubes and engages a ground surface such that the post extends upwardly from the ground surface. A connector couples the end tubes together such that the sheet of material forms an enclosure.