Flagler Estates, FL has a population of 3,533 and is the 8,005th largest city in the United States. The population density is 298 per sq mi which is 2% higher than the Florida average and 229% higher than the national average. The median age in Flagler Estates is 35 which is approximately 15% lower than the Florida average of 42. In Flagler Estates, 54% of the population over 15 years of age are married, 93% speak English and 7% speak Spanish. 52% of Flagler Estates residents were born in Florida, 42% were born out of state, 3% were born outside of the United States and 3% were foreign born.