Manteno is located in Kankakee county Illinois with a geographic area of 5.3 square miles. The total population in Manteno is 8,545 with 53.8% male and 46.2% female. Children under age 5 represent 3.3% of the population, under age 18 equal 22.2% of the population and over age 65 is 22.8% of the population. The median household income is $71,576, per capita income is $36,235. There are a total of 3,550 housing units with 70.8% owner occupied. Education includes 22.6% of residents that are high school graduates and 27.4% with a bachelor's degree or higher. The average temperature in Manteno in the summer is 74 degrees, and in the winter 27 degrees.