Sumner is located in Pierce county Washington with a geographic area of 7.5 square miles. The total population in Sumner is 10,246 with 46.3% male and 53.7% female. Children under age 5 represent 6.4% of the population, under age 18 equal 20.7% of the population and over age 65 is 18.6% of the population. The median household income is $68,447, per capita income is $36,402. There are a total of 4,273 housing units with 49.7% owner occupied. Education includes 26.8% of residents that are high school graduates and 26.5% with a bachelor's degree or higher. The average temperature in Sumner in the summer is 62 degrees, and in the winter 42 degrees.