Center Moriches, NY has a population of 8,485 and is the 4,469th largest city in the United States. The population density is 1,619 per sq mi which is 351% higher than the New York average and 1687% higher than the national average. The median age in Center Moriches is 39 which is approximately 2% higher than the New York average of 38. In Center Moriches, 63% of the population over 15 years of age are married, 91% speak English and 7% speak Spanish. 87% of Center Moriches residents were born in New York, 8% were born out of state, 0% were born outside of the United States and 5% were foreign born.