Brenham is located in Washington county Texas with a geographic area of 13.0 square miles. The total population in Brenham is 17,297 with 46.4% male and 53.6% female. Children under age 5 represent 6.4% of the population, under age 18 equal 21.8% of the population and over age 65 is 19.7% of the population. The median household income is $49,147, per capita income is $26,037. There are a total of 6,197 housing units with 60.4% owner occupied. Education includes 21.3% of residents that are high school graduates and 29.2% with a bachelor's degree or higher. The average temperature in Brenham in the summer is 84 degrees, and in the winter 49 degrees.