Katy is located in Fort bend county Texas with a geographic area of 14.5 square miles. The total population in Katy is 20,296 with 50.4% male and 49.6% female. Children under age 5 represent 6.6% of the population, under age 18 equal 25.2% of the population and over age 65 is 13.1% of the population. The median household income is $87,179, per capita income is $35,556. There are a total of 6,495 housing units with 79.1% owner occupied. Education includes 23.7% of residents that are high school graduates and 37.8% with a bachelor's degree or higher. The average temperature in Katy in the summer is 83 degrees, and in the winter 49 degrees.