A trailer hitch step assembly is configured to be secured to the rearward end of a receiver hitch mounted at the rear end of a pick-up truck. The trailer hitch step assembly is selectively pivotally movable from an operative position to a folded stowed position. When the trailer hitch step assembly is in its operative position, the steps thereof are positioned rearwardly of the tailgate of the truck when the tailgate is in its open position. The trailer hitch step assembly, when in its stowed position, enables the trailer hitch step assembly to be easily transported by the truck or removed from a truck and stowed.