Elmhurst is located in Dupage county Illinois with a geographic area of 10.2 square miles. The total population in Elmhurst is 46,571 with 49.2% male and 50.8% female. Children under age 5 represent 6.3% of the population, under age 18 equal 25.1% of the population and over age 65 is 16.5% of the population. The median household income is $123,869, per capita income is $59,911. There are a total of 16,808 housing units with 81.0% owner occupied. Education includes 12.0% of residents that are high school graduates and 62.8% with a bachelor's degree or higher. The average temperature in Elmhurst in the summer is 71 degrees, and in the winter 27 degrees.