Riverhead, NY has a population of 13,734 and is the 3,041st largest city in the United States. The population density is 910 per sq mi which is 154% higher than the New York average and 904% higher than the national average. The median age in Riverhead is 45 which is approximately 18% higher than the New York average of 38. In Riverhead, 55% of the population over 15 years of age are married, 71% speak English and 15% speak Spanish. 63% of Riverhead residents were born in New York, 12% were born out of state, 2% were born outside of the United States and 23% were foreign born.