Deerfield is located in Lake county Illinois with a geographic area of 5.5 square miles. The total population in Deerfield is 19,030 with 48.8% male and 51.2% female. Children under age 5 represent 5.2% of the population, under age 18 equal 25.5% of the population and over age 65 is 16.7% of the population. The median household income is $162,064, per capita income is $82,426. There are a total of 7,323 housing units with 82.0% owner occupied. Education includes 6.3% of residents that are high school graduates and 82.4% with a bachelor's degree or higher. The average temperature in Deerfield in the summer is 74 degrees, and in the winter 27 degrees.
