Riviera Beach is a city in Palm Beach County, Florida, U.S.A. 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. The population was 29,884 at the 2000 census. 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.