Islandia 11749 Real EstateIslandia is located in New York. Islandia, New York 11749has a population of 3,541. Islandia 11749 is less family-centric than the surrounding county with 26.06% of the households containing married families with children. The county average for households married with children is 32.94%. The median household income in Islandia, New York 11749 is $100,771. The median household income for the surrounding county is $111,660 compared to the national median of $69,021. The median age of people living in Islandia 11749 is 38.8 years. Islandia WeatherThe average high temperature in July is 83.2 degrees, with an average low temperature in January of 23.4 degrees. The average rainfall is approximately 47.3 inches per year, with 25.8 inches of snow per year. Islandia MapReal estate near IslandiaNearby CitiesNearby Cities Homes for Sale |