Mason is located in Effingham county Illinois with a geographic area of 1.3 square miles. The total population in Mason is 243 with 53.5% male and 46.5% female. Children under age 5 represent 4.5% of the population, under age 18 equal 18.5% of the population and over age 65 is 19.3% of the population. The median household income is $53,750, per capita income is $22,940. There are a total of 107 housing units with 94.4% owner occupied. Education includes 43.9% of residents that are high school graduates and 5.6% with a bachelor's degree or higher. The average temperature in Mason in the summer is 74 degrees, and in the winter 27 degrees.
