Moravian Falls is located at (36.106113, -81.176105) at an elevation of 1,118 feet above mean sea level. According to the United States Census Bureau, the CDP has a total area of , of which, of it is land and 0.20% is water. Moravian Falls is located in the foothills of the Brushy Mountains, which rise to the south of the community. Pores Knob, the highest point in the Brushy Mountains, is located in Moravian Falls.