North Merrick, NY has a population of 12,337 and is the 3,340th largest city in the United States. The population density is 7,177 per sq mi which is 1901% higher than the New York average and 7822% higher than the national average. The median age in North Merrick is 41 which is approximately 7% higher than the New York average of 38. In North Merrick, 64% of the population over 15 years of age are married, 88% speak English and 4% speak Spanish. 88% of North Merrick residents were born in New York, 4% were born out of state, 0% were born outside of the United States and 8% were foreign born.