Greenwich, NY has a population of 1,905 and is the 11,309th largest city in the United States. The population density is 1,294 per sq mi which is 261% higher than the New York average and 1328% higher than the national average. The median age in Greenwich is 40 which is approximately 5% higher than the New York average of 38. In Greenwich, 60% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 80% of Greenwich residents were born in New York, 17% were born out of state, 1% were born outside of the United States and 2% were foreign born.