East Moriches, NY has a population of 5,272 and is the 6,226th largest city in the United States. The population density is 959 per sq mi which is 167% higher than the New York average and 958% higher than the national average. The median age in East Moriches is 44 which is approximately 15% higher than the New York average of 38. In East Moriches, 61% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 90% of East Moriches residents were born in New York, 8% were born out of state, 0% were born outside of the United States and 2% were foreign born.