Hewlett is located in Nassau county New york with a geographic area of 0.9 square miles. The total population in Hewlett is 7,064 with 46.2% male and 53.8% female. Children under age 5 represent 6.9% of the population, under age 18 equal 21.5% of the population and over age 65 is 18.6% of the population. The median household income is $104,931, per capita income is $44,736. There are a total of 2,409 housing units with 77.7% owner occupied. Education includes 20.8% of residents that are high school graduates and 53.4% with a bachelor's degree or higher. The average temperature in Hewlett in the summer is 70 degrees, and in the winter 27 degrees.