Silverdale is located in Kitsap county Washington with a geographic area of 12.6 square miles. The total population in Silverdale is 21,858 with 51.2% male and 48.8% female. Children under age 5 represent 6.2% of the population, under age 18 equal 19.6% of the population and over age 65 is 16.4% of the population. The median household income is $81,458, per capita income is $39,883. There are a total of 8,790 housing units with 50.8% owner occupied. Education includes 17.0% of residents that are high school graduates and 35.2% with a bachelor's degree or higher. The average temperature in Silverdale in the summer is 60 degrees, and in the winter 42 degrees.
