Maryland heights is located in St. louis county Missouri with a geographic area of 21.9 square miles. The total population in Maryland heights is 26,996 with 48.3% male and 51.7% female. Children under age 5 represent 4.7% of the population, under age 18 equal 18.4% of the population and over age 65 is 13.6% of the population. The median household income is $69,973, per capita income is $37,854. There are a total of 11,980 housing units with 55.2% owner occupied. Education includes 14.9% of residents that are high school graduates and 55.7% with a bachelor's degree or higher. The average temperature in Maryland heights in the summer is 78 degrees, and in the winter 32 degrees.