Bartlesville is located in Washington county Oklahoma with a geographic area of 22.7 square miles. The total population in Bartlesville is 36,495 with 47.8% male and 52.2% female. Children under age 5 represent 6.7% of the population, under age 18 equal 23.9% of the population and over age 65 is 19.0% of the population. The median household income is $53,098, per capita income is $31,331. There are a total of 14,425 housing units with 66.9% owner occupied. Education includes 29.6% of residents that are high school graduates and 34.7% with a bachelor's degree or higher. The average temperature in Bartlesville in the summer is 80 degrees, and in the winter 42 degrees.