Hillsboro is located in Washington county Oregon with a geographic area of 25.7 square miles. The total population in Hillsboro is 108,026 with 50.0% male and 50.0% female. Children under age 5 represent 6.8% of the population, under age 18 equal 23.5% of the population and over age 65 is 10.6% of the population. The median household income is $85,586, per capita income is $38,162. There are a total of 38,903 housing units with 52.6% owner occupied. Education includes 14.9% of residents that are high school graduates and 47.3% with a bachelor's degree or higher. The average temperature in Hillsboro in the summer is 66 degrees, and in the winter 35 degrees.