Roanoke Rapids is a city in Halifax County, North Carolina, United States. The population was 15,754 at the 2010 census. It is the principal city …Roanoke Rapids is a city in Halifax County, North Carolina, United States. The population was 15,754 at the 2010 census. It is the principal city of the Roanoke Rapids Micropolitan Statistical Area, and is also an anchor city of the Rocky Mount-Wilson-Roanoke Rapids CSA, with a total population of 297,726 as of 2018.