Auburn is located in King county Washington with a geographic area of 29.6 square miles. The total population in Auburn is 80,914 with 49.6% male and 50.4% female. Children under age 5 represent 7.4% of the population, under age 18 equal 26.3% of the population and over age 65 is 11.4% of the population. The median household income is $76,410, per capita income is $35,288. There are a total of 29,220 housing units with 59.6% owner occupied. Education includes 25.2% of residents that are high school graduates and 27.9% with a bachelor's degree or higher. The average temperature in Auburn in the summer is 63 degrees, and in the winter 42 degrees.