The Shallotte River is a tidal river in Brunswick County, North Carolina, United States. The Shallotte River is a tidal river in Brunswick County, North Carolina. Its waters drain from the tributaries of the Green Swamp near the town of Shallotte, flowing south for approximately nine miles to empty into the Atlantic Intracoastal Waterway. In addition to the Greeā¦The Shallotte River is a tidal river in Brunswick County, North Carolina, United States. The Shallotte River is a tidal river in Brunswick County, North Carolina. Its waters drain from the tributaries of the Green Swamp near the town of Shallotte, flowing south for approximately nine miles to empty into the Atlantic Intracoastal Waterway. In addition to the Green Swamp, its river basin also includes farmland, forests, and semi-developed rural area.