St. ann is located in St. louis county Missouri with a geographic area of 3.2 square miles. The total population in St. ann is 12,689 with 47.7% male and 52.3% female. Children under age 5 represent 7.9% of the population, under age 18 equal 23.2% of the population and over age 65 is 16.0% of the population. The median household income is $47,994, per capita income is $23,843. There are a total of 5,711 housing units with 50.6% owner occupied. Education includes 36.3% of residents that are high school graduates and 16.0% with a bachelor's degree or higher. The average temperature in St. ann in the summer is 77 degrees, and in the winter 32 degrees.
