The Whitemarsh Island CDP is located at 32°2′22″N 81°0′28″W / 32.03944°N 81.00778°W (32.039482, -81.007850), occupying the island of the same name. It is bordered to the north by Richardson Creek, to the east by Turner Creek, and to the south and west by the Wilmington River, all of which are tidal water bodies. U.S. Route 80 crosses the island, leading west into Savannah and east to Tybee Island on the Atlantic shore. The Islands Expressway runs northwest from Whitemarsh Island 6.5 miles (10.5 km) to downtown Savannah.
According to the United States Census Bureau, the Whitemarsh Island CDP has a total area of 6.6 square miles (17.2 km2), of which 5.6 square miles (14.6 km2) is land and 1.0 square mile (2.6 km2), or 15.10%, is water.
Learn more about Whitemarsh Island.