Hamilton square is located in Mercer county New jersey with a geographic area of 4.3 square miles. The total population in Hamilton square is 11,526 with 47.9% male and 52.1% female. Children under age 5 represent 6.5% of the population, under age 18 equal 18.2% of the population and over age 65 is 23.4% of the population. The median household income is $110,400, per capita income is $47,176. There are a total of 4,040 housing units with 97.3% owner occupied. Education includes 16.8% of residents that are high school graduates and 52.3% with a bachelor's degree or higher. The average temperature in Hamilton square in the summer is 73 degrees, and in the winter 34 degrees.