Henderson is located in Rusk county Texas with a geographic area of 12.0 square miles. The total population in Henderson is 13,145 with 53.6% male and 46.4% female. Children under age 5 represent 6.3% of the population, under age 18 equal 23.8% of the population and over age 65 is 15.0% of the population. The median household income is $50,964, per capita income is $22,735. There are a total of 3,968 housing units with 65.0% owner occupied. Education includes 22.0% of residents that are high school graduates and 30.1% with a bachelor's degree or higher. The average temperature in Henderson in the summer is 80 degrees, and in the winter 49 degrees.