Black jack is located in St. louis county Missouri with a geographic area of 2.6 square miles. The total population in Black jack is 6,930 with 44.3% male and 55.7% female. Children under age 5 represent 6.7% of the population, under age 18 equal 26.9% of the population and over age 65 is 15.1% of the population. The median household income is $57,298, per capita income is $26,114. There are a total of 2,507 housing units with 63.6% owner occupied. Education includes 12.9% of residents that are high school graduates and 25.2% with a bachelor's degree or higher. The average temperature in Black jack in the summer is 77 degrees, and in the winter 32 degrees.
