Flanders, NY has a population of 5,125 and is the 6,351st largest city in the United States. The population density is 445 per sq mi which is 24% higher than the New York average and 391% higher than the national average. The median age in Flanders is 36 which is approximately 5% lower than the New York average of 38. In Flanders, 52% of the population over 15 years of age are married, 41% speak English and 49% speak Spanish. 47% of Flanders residents were born in New York, 3% were born out of state, 10% were born outside of the United States and 40% were foreign born.