Leyden township is located in Cook county Illinois with a geographic area of square miles. The total population in Leyden township is 90,682 with 49.2% male and 50.8% female. Children under age 5 represent 5.0% of the population, under age 18 equal 22.4% of the population and over age 65 is 14.5% of the population. The median household income is $63,681, per capita income is $28,718. There are a total of 32,387 housing units with 64.7% owner occupied. Education includes 29.5% of residents that are high school graduates and 23.6% with a bachelor's degree or higher. The average temperature in Leyden township in the summer is 74 degrees, and in the winter 27 degrees.