Seaboard is a town in Northampton County, North Carolina, United States, created as a company town by the Seaboard and Roanoke Railroad, …Seaboard is a town in Northampton County, North Carolina, United States, created as a company town by the Seaboard and Roanoke Railroad, approximately 10 miles northeast of Weldon in the mid-1840s as a place for railroad employees to live.