Beaufort is a city in and the county seat of Beaufort County, South Carolina, United States. Chartered in 1711, it is the second-oldest city in South Carolina, behind Charleston. The city's population was 12,361 in the 2010 census. It is a primary city within the Hilton Head Island-Bluffton-Beaufort, SC Metropolitan Statistical Area.Beaufort is located on Port Royal Island, in the heart of the Sea Islands and South Carolina Lowcountry. The city is renowned for its scenic location and for maintaining a historic character by preservation of its antebellum architecture. The city is also known for its military establishments, being located in close proximity to Parris Island and a U.S. naval hospital, in addition to being home of the Marine Corps Air Station Beaufort.