Riverdale, VA has a population of 1,148 and is the 14,305th largest city in the United States. The population density is 141 per sq mi which is 26% lower than the Virginia average and 56% higher than the national average. The median age in Riverdale is 39 which is approximately 4% higher than the Virginia average of 38. In Riverdale, 69% of the population over 15 years of age are married, 93% speak English and 7% speak Spanish. 70% of Riverdale residents were born in Virginia, 26% were born out of state, 0% were born outside of the United States and 3% were foreign born.