Clayton is located in St. louis county Missouri with a geographic area of 2.5 square miles. The total population in Clayton is 16,763 with 49.5% male and 50.5% female. Children under age 5 represent 3.5% of the population, under age 18 equal 17.4% of the population and over age 65 is 11.7% of the population. The median household income is $108,387, per capita income is $66,967. There are a total of 5,587 housing units with 57.0% owner occupied. Education includes 1.7% of residents that are high school graduates and 87.0% with a bachelor's degree or higher. The average temperature in Clayton in the summer is 77 degrees, and in the winter 32 degrees.
