Tomball is located in Harris county Texas with a geographic area of 13.0 square miles. The total population in Tomball is 11,689 with 47.8% male and 52.2% female. Children under age 5 represent 7.3% of the population, under age 18 equal 23.0% of the population and over age 65 is 18.8% of the population. The median household income is $59,944, per capita income is $31,656. There are a total of 4,516 housing units with 45.6% owner occupied. Education includes 26.5% of residents that are high school graduates and 27.9% with a bachelor's degree or higher. The average temperature in Tomball in the summer is 83 degrees, and in the winter 49 degrees.