Port Royal is a town in Beaufort County, South Carolina, United States. The population was 3,950 at the 2000 census. Due largely to incorporation, the population of the Port Royal town limits has more than doubled since 2000. As defined by the U.S. Census Bureau, Port Royal is included within the Beaufort Urban Cluster and the larger Hilton Head Island-Beaufort Micropolitan Area. Port Royal apartments for rent comparison page shows most up to date rent information on Port Royal apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.