Newport Coast is an affluent community south of the main body of the city of Newport Beach, California. It was a separate census-designated place in Orange County, California, United States, until 2001, when it was annexed into Newport Beach. The population was 9,741 at the 2010 United States Census.The master-planned community was developed by the Irvine Company. There are a variety of home types in the community, from small studio apartments to ocean view mansions occupied by well-known celebrities.