Brandywine Bay is a planned community and census-designated place in Carteret County, North Carolina, United States. It was first listed as a CDP in the 2020 census with a population of 1,153.The community is in west-central Carteret County, bordered to the east by Morehead City. U.S. Route 70 forms the northern edge of the CDP, and North Carolina Highway 24 forms the southern edge.