Arlington is located in Tarrant county Texas with a geographic area of 95.9 square miles. The total population in Arlington is 397,269 with 48.6% male and 51.4% female. Children under age 5 represent 6.7% of the population, under age 18 equal 25.8% of the population and over age 65 is 10.5% of the population. The median household income is $63,351, per capita income is $28,904. There are a total of 135,240 housing units with 55.7% owner occupied. Education includes 20.5% of residents that are high school graduates and 34.0% with a bachelor's degree or higher. The average temperature in Arlington in the summer is 83 degrees, and in the winter 49 degrees.