Bainbridge island is located in Kitsap county Washington with a geographic area of 27.6 square miles. The total population in Bainbridge island is 24,859 with 48.7% male and 51.3% female. Children under age 5 represent 4.3% of the population, under age 18 equal 22.1% of the population and over age 65 is 26.4% of the population. The median household income is $125,861, per capita income is $66,883. There are a total of 10,170 housing units with 80.9% owner occupied. Education includes 2.4% of residents that are high school graduates and 75.6% with a bachelor's degree or higher. The average temperature in Bainbridge island in the summer is 64 degrees, and in the winter 42 degrees.