Crestwood is located in St. louis county Missouri with a geographic area of 3.6 square miles. The total population in Crestwood is 11,859 with 48.5% male and 51.5% female. Children under age 5 represent 5.3% of the population, under age 18 equal 19.6% of the population and over age 65 is 19.0% of the population. The median household income is $94,161, per capita income is $42,923. There are a total of 4,737 housing units with 87.8% owner occupied. Education includes 9.4% of residents that are high school graduates and 58.6% with a bachelor's degree or higher. The average temperature in Crestwood in the summer is 77 degrees, and in the winter 32 degrees.