Wilmington is a port city in New Hanover County, North Carolina, United States. With a population of 115,451 as of the 2020 census, it is the …Wilmington is a port city in New Hanover County, North Carolina, United States. With a population of 115,451 as of the 2020 census, it is the eighth-most populous city in the state. The county seat of New Hanover County, it is the principal city of the Wilmington metropolitan area, which includes New Hanover, Brunswick, and Pender counties. As of 2023, the region had an estimated population of 467,337.