Oak Island, North Carolina is a town located mostly on Oak Island in Brunswick County, North Carolina; a small part of the town extends onto the mainland north of the island's bridge. The population was 6,571 at the 2000 census. It was founded in 1999 by the consolidation of the towns of Long Beach and Yaupon Beach. Its main industry is tourism; the town has an average summer population of 30-40,000. Oak Island apartments for rent comparison page shows most up to date rent information on Oak Island apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.