Mercerville is located in Mercer county New jersey with a geographic area of 3.7 square miles. The total population in Mercerville is 12,783 with 45.5% male and 54.5% female. Children under age 5 represent 4.7% of the population, under age 18 equal 19.0% of the population and over age 65 is 20.1% of the population. The median household income is $97,969, per capita income is $40,179. There are a total of 4,581 housing units with 82.9% owner occupied. Education includes 26.9% of residents that are high school graduates and 41.1% with a bachelor's degree or higher. The average temperature in Mercerville in the summer is 73 degrees, and in the winter 34 degrees.
