Islandia is a city located in New York. With a 2020 population of 3,305, it is the 220th largest city in New York and the 5935th largest city in the United States. Islandia is currently declining at a rate of -0.27% annually and its population has decreased by -0.90% since the most recent census, which recorded a population of 3,335 in 2010. Islandia reached it's highest population of 3,366 in 2014. Spanning over 2 miles, Islandia has a population density of 1,493 people per square mile.
The average household income in Islandia is $108,539 with a poverty rate of 4.13%. The median rental costs in recent years comes to $1,947 per month, and the median house value is $317,400. The median age in Islandia is 37.5 years, 36.2 years for males, and 41.7 years for females. For every 100 females there are 91.0 males.