Abstract: The post holder is a hinged clamp mechanism having three hinge plates, including a back plate and two side plates. The two side plates are hinged to opposite edges of the back plate, and can be folded to form a hollow triangular prism open at both ends and secured by inserting a locking hinge pin through aligned knuckles along the edges of the side plates. Elongated, rod-shaped handles extend from the side plates. The back plate has spaced slots defined therein adapted for engaging studs protruding from a T-post. The locking hinge pin may be tethered to one of the plates, and handgrips may cushion the ends of the handles.