The Whitemarsh Island CDP is located at 32°2′22″N81°0′28″W / 32.03944°N 81.00778°W / 32.03944; -81.00778 (32.039482, -81.007850),[4] 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.[5]
Whitemarsh Island, Georgia – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
^"Home". Islands High School. Retrieved March 19, 2023. 170 Whitemarsh Island Road Savannah, GA 31410 - Despite the Savannah address, it is in the Whitemarsh Island CDP.
^"Home". Coastal Middle School. Retrieved March 19, 2023. 4595 US Highway 80 East Savannah, GA 31410 - Despite the Savannah address, it is in the Whitemarsh Island CDP.
^"Home". Marshpoint Elementary School. Retrieved March 19, 2023. 135 Whitemarsh Island Road Savannah, GA 31410 - Despite the Savannah address, it is in the Whitemarsh Island CDP.