North plainfield is located in Union county New jersey with a geographic area of 2.8 square miles. The total population in North plainfield is 21,445 with 48.3% male and 51.7% female. Children under age 5 represent 5.8% of the population, under age 18 equal 20.5% of the population and over age 65 is 11.2% of the population. The median household income is $77,160, per capita income is $34,156. There are a total of 7,579 housing units with 56.6% owner occupied. Education includes 26.4% of residents that are high school graduates and 31.8% with a bachelor's degree or higher. The average temperature in North plainfield in the summer is 73 degrees, and in the winter 34 degrees.
