Newport Coast is a 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. Newport Beach, California's estimated population is 86,160 according to the most recent United States census estimates. Newport Beach, California is the 96th largest city in California based on official 2017 estimates from the US Census Bureau.