is the third oldest city in the U.S. state of South Carolina and the county seat of Georgetown County. Located on Winyah Bay at the confluence of the Great Pee Dee River, Waccamaw River, and Sampit River, Georgetown is the second largest seaport in South Carolina, handling over 960,000 tons of materials a year.
According to the United States Census Bureau, the city has a total area of 7.2 square miles (18.6 km²), of which, 6.5 square miles (16.9 km²) of it is land and 0.6 square miles (1.6 km²) of it (8.79%) is water.
Winyah Bay was formed from a Submergent or drowned coastline, ie. the original rivers had a lower base line, but either the ocean rose or the land sank, changing the landform and making a good location for a harbour. The rising of the ocean may be due to melting of glacial ice at the end of the ice age.