Fern Park, FL has a population of 7,924 and is the 4,723rd largest city in the United States. The population density is 3,935 per sq mi which is 1240% higher than the Florida average and 4243% higher than the national average. The median age in Fern Park is 47 which is approximately 12% higher than the Florida average of 42. In Fern Park, 47% of the population over 15 years of age are married, 83% speak English and 14% speak Spanish. 39% of Fern Park residents were born in Florida, 47% were born out of state, 3% were born outside of the United States and 12% were foreign born.