Greenvale is located in Nassau county New york with a geographic area of 0.3 square miles. The total population in Greenvale is 1,350 with 53.9% male and 46.1% female. Children under age 5 represent 4.8% of the population, under age 18 equal 16.0% of the population and over age 65 is 17.3% of the population. The median household income is $130,707, per capita income is $62,495. There are a total of 425 housing units with 57.9% owner occupied. Education includes 31.1% of residents that are high school graduates and 59.5% with a bachelor's degree or higher. The average temperature in Greenvale in the summer is 70 degrees, and in the winter 27 degrees.