Riviera Beach is a city in Palm Beach County, Florida, United States, which was incorporated on September 29, 1922. Due to the location of its eastern boundary, it is also the easternmost municipality in the Miami metropolitan area. In the 2020 U.S. Census, the total population of Riviera Beach residents was 37,604 people. Riviera Beach is predominantly an African-American city and it is on the list of U.S. cities with African American majority populations.