Hopewell township is located in Mercer county New jersey with a geographic area of 0.7 square miles. The total population in Hopewell township is 4,354 with 50.6% male and 49.4% female. Children under age 5 represent 3.4% of the population, under age 18 equal 23.1% of the population and over age 65 is 23.7% of the population. The median household income is $82,197, per capita income is $33,800. There are a total of 1,472 housing units with 85.3% owner occupied. Education includes 40.1% of residents that are high school graduates and 26.0% with a bachelor's degree or higher. The average temperature in Hopewell township in the summer is 73 degrees, and in the winter 34 degrees.