Belville is a town in Brunswick County, North Carolina, United States. The population was 2,406 at the 2020 census. It is part of the Wilmington…Belville is a town in Brunswick County, North Carolina, United States. The population was 2,406 at the 2020 census. It is part of the Wilmington, NC metropolitan area. Belville was incorporated as a town in 1977.