Melville, NY has a population of 18,320 and is the 2,382nd largest city in the United States. The population density is 1,515 per sq mi which is 322% higher than the New York average and 1572% higher than the national average. The median age in Melville is 48 which is approximately 27% higher than the New York average of 38. In Melville, 72% of the population over 15 years of age are married, 86% speak English and 3% speak Spanish. 82% of Melville residents were born in New York, 6% were born out of state, 1% were born outside of the United States and 12% were foreign born.