Riviera Beach is a city in Palm Beach County, Florida, United States, which was incorporated September 29, 1922. Because of where its eastern boundary lies, it is also the easternmost municipality in the South Florida metropolitan area. As of 2004, the population was estimated by the U.S. Census Bureau to be 32,522. Riviera Beach is predominantly an African American city and it is on the List of U.S. cities with African American majority populations. It is home to the Port of Palm Beach and a United States Coast Guard station, and has its own marina. Riviera Beach is also home to the Blue Heron Bridge, one of the country's top rated beach dive sites.