Abstract: A ladder rung plug is provided for preventing insect infestation of open ended ladder rungs, providing additional storage space, and selectively supporting items from the ladder. The plug assembly includes a ladder having a rung with an open end. A plug is provided having a first end, a second end, and a peripheral edge extending between the first end and the second end. The first end is insertable into the open end of the rung. Thus, the open end may be sealed by the plug. In an embodiment, a wall extends from the first end of the plug forming a storage compartment with an opening through the plug. A cap is selectively couplable to the plug to close the storage compartment.