Whitemarsh Island (; ) is a census-designated place (CDP) in Chatham County, Georgia, United States. The population was 6,983 at the 2020 U.S Census. It is part of the Savannah Metropolitan Statistical Area. The communities of Whitemarsh Island are a relatively affluent suburb of Savannah. Geography The Whitemarsh Island CDP is located at (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 to downtown Savannah. According to the United States Census Bureau, the Whitemarsh Island CDP has a total area of , of which is land and , or 15.10%, is water. Demographics 2020 census As of the 2020 United States census, there were 6,983 people, 2,752 households, and 1,704 families residing in the CDP. 2000 census As of the census of 2000, there were 5,824 people, 2,302 households, and 1,609 families residing in the CDP. The population density was . There were 2,427 housing units at an average density of . The racial makeup of the CDP was 82.19% White, 9.24% African American, 0.26% Native American, 5.75% Asian, 0.12% Pacific Islander, 1.01% from other races, and 1.43% from two or more races. Hispanic or Latino of any race were 2.40% of the population. There were 2,302 households, out of which 34.8% had children under the age of 18 living with them, 59.1% were married couples living together, 7.7% had a female householder with no husband present, and 30.1% were non-families. 22.6% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 2.99. In the CDP, the population was spread out, with 25.0% under the age of 18, 7.8% from 18 to 24, 34.8% from 25 to 44, 23.9% from 45 to 64, and 8.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 96.2 males. For every 100 females age 18 and over, there were 95.9 males. The median income for a household in the