Round rock is located in Williamson county Texas with a geographic area of 37.6 square miles. The total population in Round rock is 128,812 with 49.3% male and 50.7% female. Children under age 5 represent 5.9% of the population, under age 18 equal 25.9% of the population and over age 65 is 9.1% of the population. The median household income is $86,121, per capita income is $37,131. There are a total of 41,896 housing units with 58.6% owner occupied. Education includes 13.8% of residents that are high school graduates and 46.2% with a bachelor's degree or higher. The average temperature in Round rock in the summer is 83 degrees, and in the winter 49 degrees.
