Ann arbor is located in Washtenaw county Michigan with a geographic area of 28.2 square miles. The total population in Ann arbor is 121,093 with 49.4% male and 50.6% female. Children under age 5 represent 3.9% of the population, under age 18 equal 12.4% of the population and over age 65 is 11.9% of the population. The median household income is $69,456, per capita income is $44,710. There are a total of 48,109 housing units with 45.4% owner occupied. Education includes 6.6% of residents that are high school graduates and 73.0% with a bachelor's degree or higher. The average temperature in Ann arbor in the summer is 71 degrees, and in the winter 23 degrees.