River Ridge, FL has a population of 4,523 and is the 6,906th largest city in the United States. The population density is 1,024 per sq mi which is 249% higher than the Florida average and 1030% higher than the national average. The median age in River Ridge is 50 which is approximately 20% higher than the Florida average of 42. In River Ridge, 62% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 32% of River Ridge residents were born in Florida, 61% were born out of state, 1% were born outside of the United States and 6% were foreign born.