Abstract: A tree stand for use in hunting and observing wildlife that includes a collapsible platform and collapsible seat support assembly. In several constructions, a platform assembly includes several pivot joints that permit multiple platform sections to fold together. The folding sections may also include frame members that fan fold together. An adjoining seat support and/or seat assemblies fold with the platform to widths that accommodate transport. In several other platform constructions, the platform assembly includes several pivot joints that permit perimeter, interior and end frame members and/or multi-section stays to fold. Underlying cross supports, end straps, end caps and wires stabilize and maintain the displacement of the platform frame members and stays. Several alternative seat support assemblies, platform and sling seat assemblies, cable and strap supports are also disclosed in various tree stand combinations.