Highland Beach, FL has a population of 3,689 and is the 7,801st largest city in the United States. The population density is 7,692 per sq mi which is 2520% higher than the Florida average and 8390% higher than the national average. The median age in Highland Beach is 66 which is approximately 58% higher than the Florida average of 42. In Highland Beach, 77% of the population over 15 years of age are married, 84% speak English and 5% speak Spanish. 8% of Highland Beach residents were born in Florida, 76% were born out of state, 1% were born outside of the United States and 15% were foreign born.