Old westbury is located in Nassau county New york with a geographic area of 8.6 square miles. The total population in Old westbury is 4,618 with 45.6% male and 54.4% female. Children under age 5 represent 1.5% of the population, under age 18 equal 14.6% of the population and over age 65 is 15.1% of the population. The median household income is $224,250, per capita income is $87,895. There are a total of 1,119 housing units with 93.4% owner occupied. Education includes 13.6% of residents that are high school graduates and 76.9% with a bachelor's degree or higher. The average temperature in Old westbury in the summer is 70 degrees, and in the winter 27 degrees.
