East st. louis is located in St. clair county Illinois with a geographic area of 13.9 square miles. The total population in East st. louis is 26,359 with 42.8% male and 57.2% female. Children under age 5 represent 5.1% of the population, under age 18 equal 22.1% of the population and over age 65 is 18.2% of the population. The median household income is $24,009, per capita income is $18,251. There are a total of 10,909 housing units with 49.3% owner occupied. Education includes 34.8% of residents that are high school graduates and 10.2% with a bachelor's degree or higher. The average temperature in East st. louis in the summer is 74 degrees, and in the winter 27 degrees.