Xenia is located in Clay county Illinois with a geographic area of 0.5 square miles. The total population in Xenia is 365 with 52.1% male and 47.9% female. Children under age 5 represent 10.4% of the population, under age 18 equal 29.6% of the population and over age 65 is 19.5% of the population. The median household income is $44,167, per capita income is $21,818. There are a total of 156 housing units with 76.9% owner occupied. Education includes 37.8% of residents that are high school graduates and 12.8% with a bachelor's degree or higher. The average temperature in Xenia in the summer is 74 degrees, and in the winter 27 degrees.