Tualatin is located in Washington county Oregon with a geographic area of 8.3 square miles. The total population in Tualatin is 27,601 with 48.8% male and 51.2% female. Children under age 5 represent 5.6% of the population, under age 18 equal 23.7% of the population and over age 65 is 11.4% of the population. The median household income is $92,454, per capita income is $42,483. There are a total of 10,584 housing units with 54.3% owner occupied. Education includes 12.5% of residents that are high school graduates and 47.8% with a bachelor's degree or higher. The average temperature in Tualatin in the summer is 65 degrees, and in the winter 35 degrees.