Hays is located in Ellis county Kansas with a geographic area of 8.6 square miles. The total population in Hays is 20,855 with 49.0% male and 51.0% female. Children under age 5 represent 5.6% of the population, under age 18 equal 19.8% of the population and over age 65 is 16.0% of the population. The median household income is $52,135, per capita income is $29,044. There are a total of 8,484 housing units with 58.1% owner occupied. Education includes 20.0% of residents that are high school graduates and 41.7% with a bachelor's degree or higher. The average temperature in Hays in the summer is 77 degrees, and in the winter 32 degrees.