Abstract: A collapsible chair apparatus includes a pair of planar side panels each of which includes a lower side panel portion which includes a front lower region and a rear lower region. Each side panel also includes an upper side panel portion which extends upward from the rear lower region. A front slot extends into the front lower region. A lower rear slot extends into the rear lower region. An upper rear slot extends into the upper side panel portion and is coplanar with the lower rear slot. A planar back panel includes a pair of lower back slots which are registrable with the lower rear slots of the side panels. A pair of upper back slots in the back panel are registrable with the upper rear slots of the side panels. A lock-tab receiving channel is present in the back panel and is coplanar with the front slots of the side panels. A seat assembly includes a planar seat panel and a spacer element which projects downward from a front portion of the seat panel.