Franklin park is located in Cook county Illinois with a geographic area of 4.8 square miles. The total population in Franklin park is 17,779 with 48.8% male and 51.2% female. Children under age 5 represent 5.8% of the population, under age 18 equal 22.0% of the population and over age 65 is 12.1% of the population. The median household income is $67,755, per capita income is $26,547. There are a total of 5,747 housing units with 72.2% owner occupied. Education includes 32.1% of residents that are high school graduates and 18.9% with a bachelor's degree or higher. The average temperature in Franklin park in the summer is 74 degrees, and in the winter 27 degrees.