Fire Island, NY has a population of 268 and is the 23,058th largest city in the United States. The population density is 29 per sq mi which is 92% lower than the New York average and 68% lower than the national average. The median age in Fire Island is 39 which is approximately 2% higher than the New York average of 38. In Fire Island, 62% of the population over 15 years of age are married, 66% speak English and 28% speak Spanish. 60% of Fire Island residents were born in New York, 18% were born out of state, 0% were born outside of the United States and 23% were foreign born.