Oak harbor is located in Island county Washington with a geographic area of 9.7 square miles. The total population in Oak harbor is 23,358 with 49.1% male and 50.9% female. Children under age 5 represent 10.1% of the population, under age 18 equal 27.0% of the population and over age 65 is 12.0% of the population. The median household income is $56,889, per capita income is $29,355. There are a total of 9,611 housing units with 42.6% owner occupied. Education includes 26.7% of residents that are high school graduates and 23.4% with a bachelor's degree or higher. The average temperature in Oak harbor in the summer is 58 degrees, and in the winter 42 degrees.
