Penns grove is located in Salem county New jersey with a geographic area of 0.9 square miles. The total population in Penns grove is 4,793 with 48.8% male and 51.2% female. Children under age 5 represent 7.3% of the population, under age 18 equal 34.9% of the population and over age 65 is 6.4% of the population. The median household income is $32,361, per capita income is $17,241. There are a total of 1,667 housing units with 28.0% owner occupied. Education includes 40.9% of residents that are high school graduates and 9.5% with a bachelor's degree or higher. The average temperature in Penns grove in the summer is 73 degrees, and in the winter 34 degrees.