Des moines is located in Polk county Iowa with a geographic area of 88.2 square miles. The total population in Des moines is 215,408 with 49.1% male and 50.9% female. Children under age 5 represent 7.0% of the population, under age 18 equal 24.0% of the population and over age 65 is 12.0% of the population. The median household income is $54,843, per capita income is $29,064. There are a total of 85,667 housing units with 59.6% owner occupied. Education includes 26.2% of residents that are high school graduates and 31.3% with a bachelor's degree or higher. The average temperature in Des moines in the summer is 73 degrees, and in the winter 23 degrees.