Abstract: A collapsible cage for housing an animal having an expanded and a collapsed configuration. The collapsible cage comprises a top platform and a bottom platform defining the ceiling and floor of said collapsible cage, a first accordion wall, a second accordion wall, a first end wall, and a second end wall, which collectively define a cage interior when the collapsible cage is in an expanded configuration. The first end wall rotatably engages the bottom platform and the second end wall rotatably engages the top platform. The first accordion wall and second accordion wall each have a first upper portion and a first lower portion. The first upper portions have first upper ends rotatably attached to the top platform, and the first lower portions have first lower ends rotatably attached to the bottom platform. The first upper portions rotatably engage the first lower portions along a hinge intermediate of the first upper ends and the first lower ends.