Riviera Beach, FL has a population of 33,683 and is the 1,257th largest city in the United States. The population density is 4,075 per sq mi which is 1288% higher than the Florida average and 4398% higher than the national average. The median age in Riviera Beach is 38 which is approximately 9% lower than the Florida average of 42. In Riviera Beach, 46% of the population over 15 years of age are married, 81% speak English and 7% speak Spanish. 55% of Riviera Beach residents were born in Florida, 26% were born out of state, 2% were born outside of the United States and 18% were foreign born.