The Charleston Harbor is an inlet (8 sq mi/20.7 km2) of the Atlantic Ocean at Charleston, South Carolina. The inlet is formed by the junction of Ashley and Cooper rivers at 32°49′7.10″N 79°55′40.41″W / 32.8186389°N 79.9278917°W. Morris and Sullivan's Islands shelter the entrance. Charleston Harbor forms part of the Intracoastal Waterway.[1]