Brookfield is located in Cook county Illinois with a geographic area of 3.1 square miles. The total population in Brookfield is 18,520 with 45.7% male and 54.3% female. Children under age 5 represent 7.6% of the population, under age 18 equal 26.3% of the population and over age 65 is 13.2% of the population. The median household income is $84,891, per capita income is $38,222. There are a total of 6,988 housing units with 78.9% owner occupied. Education includes 19.2% of residents that are high school graduates and 43.0% with a bachelor's degree or higher. The average temperature in Brookfield in the summer is 74 degrees, and in the winter 27 degrees.
