Greenlawn, NY has a population of 14,208 and is the 2,958th largest city in the United States. The population density is 3,815 per sq mi which is 963% higher than the New York average and 4111% higher than the national average. The median age in Greenlawn is 43 which is approximately 13% higher than the New York average of 38. In Greenlawn, 61% of the population over 15 years of age are married, 80% speak English and 12% speak Spanish. 75% of Greenlawn residents were born in New York, 8% were born out of state, 2% were born outside of the United States and 15% were foreign born.