Wadmalaw Island, SC is a city located in Charleston County, South Carolina and has a land area of 41.90 square miles (108.52 km2). The water area for the city is 8.73 square miles or 22.61 km2. There is one unique zip code in Wadmalaw Island, South Carolina and it is 29487. The area code(s) for Wadmalaw Island is 843.
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