Hilton Head Island is a resort town in Beaufort County, South Carolina, United States. It is a barrier island within the South Carolina Lowcountry, located 20 miles (32 km) northeast of Savannah, Georgia, and 95 miles (153 km) southwest of Charleston. The year-round population was 37,661 at the 2020 census, although during the peak of summer vacation season the population can swell to 150,000. It is the principal city of the Hilton Head Island metropolitan area, which had an estimated population of 232,523 in 2023.