Cape girardeau is located in Cape girardeau county Missouri with a geographic area of 29.1 square miles. The total population in Cape girardeau is 40,100 with 48.0% male and 52.0% female. Children under age 5 represent 5.3% of the population, under age 18 equal 18.1% of the population and over age 65 is 18.4% of the population. The median household income is $45,713, per capita income is $25,503. There are a total of 15,855 housing units with 53.7% owner occupied. Education includes 24.1% of residents that are high school graduates and 35.0% with a bachelor's degree or higher. The average temperature in Cape girardeau in the summer is 78 degrees, and in the winter 32 degrees.