Westmont is located in Dupage county Illinois with a geographic area of 5.0 square miles. The total population in Westmont is 24,677 with 46.2% male and 53.8% female. Children under age 5 represent 7.2% of the population, under age 18 equal 20.4% of the population and over age 65 is 18.3% of the population. The median household income is $69,902, per capita income is $43,229. There are a total of 10,485 housing units with 52.3% owner occupied. Education includes 18.6% of residents that are high school graduates and 46.7% with a bachelor's degree or higher. The average temperature in Westmont in the summer is 74 degrees, and in the winter 27 degrees.