Foristell is located in St. charles county Missouri with a geographic area of 5.6 square miles. The total population in Foristell is 881 with 43.2% male and 56.8% female. Children under age 5 represent 3.2% of the population, under age 18 equal 28.6% of the population and over age 65 is 27.9% of the population. The median household income is $92,417, per capita income is $41,947. There are a total of 304 housing units with 89.1% owner occupied. Education includes 24.7% of residents that are high school graduates and 44.1% with a bachelor's degree or higher. The average temperature in Foristell in the summer is 76 degrees, and in the winter 32 degrees.