CDP was $58,087, and the median income for a family was $73,704. Males had a median income of $47,083 versus $32,055 for females. The per capita income for the CDP was $31,529. About 1.2% of families and 5.0% of the population were below the poverty line, including 2.1% of those under age 18 and 4.0% of those age 65 or over. Neighborhoods Long Point Plantation is located on Whitemarsh Island, just east of the intersection of US HWY 80 and Johnny Mercer Boulevard. It can be reached by driving east on US 80 or from the Islands Expressway. Housing costs on Whitemarsh Island range from $150,000 to upwards of $2,900,000. References Census-designated places in Chatham County, Georgia Census-designated places in Georgia (U.S. state) Savannah metropolitan area Populated coastal places in Georgia (U.S. state)