Detroit is located in Wayne county Michigan with a geographic area of 138.7 square miles. The total population in Detroit is 672,351 with 47.3% male and 52.7% female. Children under age 5 represent 7.2% of the population, under age 18 equal 24.8% of the population and over age 65 is 13.9% of the population. The median household income is $32,498, per capita income is $19,569. There are a total of 270,446 housing units with 47.6% owner occupied. Education includes 29.4% of residents that are high school graduates and 18.2% with a bachelor's degree or higher. The average temperature in Detroit in the summer is 72 degrees, and in the winter 23 degrees.