Port Washington, NY has a population of 15,925 and is the 2,688th largest city in the United States. The population density is 3,805 per sq mi which is 961% higher than the New York average and 4100% higher than the national average. The median age in Port Washington is 44 which is approximately 16% higher than the New York average of 38. In Port Washington, 70% of the population over 15 years of age are married, 78% speak English and 11% speak Spanish. 68% of Port Washington residents were born in New York, 11% were born out of state, 2% were born outside of the United States and 19% were foreign born.