Miami Beach, FL has a population of 91,784 and is the 352nd largest city in the United States. The population density is 11,943 per sq mi which is 3968% higher than the Florida average and 13083% higher than the national average. The median age in Miami Beach is 42 which is approximately equal to the Florida average of 42. In Miami Beach, 43% of the population over 15 years of age are married, 32% speak English and 54% speak Spanish. 20% of Miami Beach residents were born in Florida, 24% were born out of state, 3% were born outside of the United States and 53% were foreign born.