Riviera Beach is a census-designated place in Anne Arundel County, Maryland, United States. The population was 12,677 at the 2010 U.S. census. Prior to the passage of the Fair Housing Act of 1968, racially restrictive covenants were used in Maryland to exclude African-Americans and other minorities. A July 8, 1928 advertisement in the Baltimore S…Riviera Beach is a census-designated place in Anne Arundel County, Maryland, United States. The population was 12,677 at the 2010 U.S. census. Prior to the passage of the Fair Housing Act of 1968, racially restrictive covenants were used in Maryland to exclude African-Americans and other minorities. A July 8, 1928 advertisement in the Baltimore Sun for houses in Riviera Beach described the community as a "refined, restricted" neighborhood.