Riverside, NY has a population of 4,747 and is the 6,688th largest city in the United States. The population density is 1,748 per sq mi which is 387% higher than the New York average and 1829% higher than the national average. The median age in Riverside is 35 which is approximately 8% lower than the New York average of 38. In Riverside, 24% of the population over 15 years of age are married, 88% speak English and 11% speak Spanish. 77% of Riverside residents were born in New York, 9% were born out of state, 3% were born outside of the United States and 11% were foreign born.