 Georgetown County comprises the Georgetown, SC Micropolitan Statistical Area, which is also included in the Myrtle Beach-Conway, SC-NC Combined Statistical Area.According to the U.S. Census Bureau, the county has a total area of , of which is land and (21%) is water.Georgetown County has several rivers, including the Great Pee Dee River, the Waccamaw River, Black River, and Sampit River, all of which flow into Winyah Bay.