Oyster Bay, NY has a population of 6,226 and is the 5,614th largest city in the United States. The population density is 5,048 per sq mi which is 1307% higher than the New York average and 5471% higher than the national average. The median age in Oyster Bay is 46 which is approximately 19% higher than the New York average of 38. In Oyster Bay, 58% of the population over 15 years of age are married, 81% speak English and 11% speak Spanish. 78% of Oyster Bay residents were born in New York, 7% were born out of state, 0% were born outside of the United States and 15% were foreign born.