Huntsville is located in Madison county Alabama with a geographic area of 218.1 square miles. The total population in Huntsville is 199,845 with 48.6% male and 51.4% female. Children under age 5 represent 6.0% of the population, under age 18 equal 19.9% of the population and over age 65 is 16.4% of the population. The median household income is $56,758, per capita income is $36,762. There are a total of 86,961 housing units with 56.7% owner occupied. Education includes 15.6% of residents that are high school graduates and 46.5% with a bachelor's degree or higher. The average temperature in Huntsville in the summer is 78 degrees, and in the winter 43 degrees.