Rio, FL has a population of 983 and is the 15,272nd largest city in the United States. The population density is 2,588 per sq mi which is 782% higher than the Florida average and 2757% higher than the national average. The median age in Rio is 56 which is approximately 35% higher than the Florida average of 42. In Rio, 57% of the population over 15 years of age are married, 88% speak English and 5% speak Spanish. 38% of Rio residents were born in Florida, 48% were born out of state, 0% were born outside of the United States and 14% were foreign born.