Allentown is located in Monmouth county New jersey with a geographic area of 0.6 square miles. The total population in Allentown is 1,740 with 48.9% male and 51.1% female. Children under age 5 represent 7.0% of the population, under age 18 equal 21.8% of the population and over age 65 is 14.8% of the population. The median household income is $100,769, per capita income is $46,845. There are a total of 676 housing units with 77.2% owner occupied. Education includes 15.4% of residents that are high school graduates and 54.1% with a bachelor's degree or higher. The average temperature in Allentown in the summer is 73 degrees, and in the winter 34 degrees.