Sunny Isles Beach, FL has a population of 21,937 and is the 1,986th largest city in the United States. The population density is 21,715 per sq mi which is 7296% higher than the Florida average and 23868% higher than the national average. The median age in Sunny Isles Beach is 49 which is approximately 17% higher than the Florida average of 42. In Sunny Isles Beach, 55% of the population over 15 years of age are married, 28% speak English and 41% speak Spanish. 14% of Sunny Isles Beach residents were born in Florida, 25% were born out of state, 1% were born outside of the United States and 60% were foreign born.