Tidewater region is a geographic area in the US.
North Carolina ( [ nɔrθ_kærəˈlaɪnə ] ) is a state in the southeastern region of the United States . The Piedmont is a plateau region located in the eastern United States . Tidewater region . Planters in the early American colonies extended their tobacco productions above the `` fall line , '' where waterfalls or rapids mark the end of the Tidewater and the beginning of the foothill region known as the Piedmont . Virginia ( [ vɚˈdʒɪnjə ] , [ vɚˈdʒɪni.ə ] , officially the Commonwealth of Virginia ) is a state located on the Atlantic Coast of the United States .