High Quality Content by WIKIPEDIA articles! Daufuskie Island is a residential "sea island" between Savannah, Georgia and Hilton Head Island, South Carolina about 2.75 miles (4.43 km) offshore. The total island surface is just 8 square miles (21 km2) within the maximum length of 5 miles (8.0 km) and maximum width of 2.5 miles (4.0 km).