Northampton is located in Long island New york with a geographic area of 11.4 square miles. The total population in Northampton is 1,627 with 55.6% male and 44.4% female. Children under age 5 represent 14.1% of the population, under age 18 equal 24.5% of the population and over age 65 is 6.6% of the population. The median household income is $133,216, per capita income is $32,824. There are a total of 417 housing units with 44.8% owner occupied. Education includes 19.7% of residents that are high school graduates and 49.2% with a bachelor's degree or higher. The average temperature in Northampton in the summer is 70 degrees, and in the winter 27 degrees.