North valley stream is located in Long island New york with a geographic area of 1.9 square miles. The total population in North valley stream is 18,712 with 47.6% male and 52.4% female. Children under age 5 represent 3.9% of the population, under age 18 equal 18.2% of the population and over age 65 is 17.2% of the population. The median household income is $124,267, per capita income is $42,826. There are a total of 5,575 housing units with 87.6% owner occupied. Education includes 17.9% of residents that are high school graduates and 42.9% with a bachelor's degree or higher. The average temperature in North valley stream in the summer is 70 degrees, and in the winter 27 degrees.