River Park, FL has a population of 5,538 and is the 6,048th largest city in the United States. The population density is 2,336 per sq mi which is 695% higher than the Florida average and 2478% higher than the national average. The median age in River Park is 51 which is approximately 21% higher than the Florida average of 42. In River Park, 46% of the population over 15 years of age are married, 89% speak English and 5% speak Spanish. 31% of River Park residents were born in Florida, 61% were born out of state, 2% were born outside of the United States and 6% were foreign born.