Hewlett neck is located in Nassau county New york with a geographic area of 0.2 square miles. The total population in Hewlett neck is 635 with 53.2% male and 46.8% female. Children under age 5 represent 8.8% of the population, under age 18 equal 35.6% of the population and over age 65 is 10.2% of the population. The median household income is $235,000, per capita income is $78,310. There are a total of 172 housing units with 95.9% owner occupied. Education includes 0.0% of residents that are high school graduates and 89.0% with a bachelor's degree or higher. The average temperature in Hewlett neck in the summer is 70 degrees, and in the winter 27 degrees.