Caledonia is located in Boone county Illinois with a geographic area of 1.0 square miles. The total population in Caledonia is 195 with 58.5% male and 41.5% female. Children under age 5 represent 8.7% of the population, under age 18 equal 17.9% of the population and over age 65 is 5.6% of the population. The median household income is $73,958, per capita income is $41,208. There are a total of 89 housing units with 69.7% owner occupied. Education includes 23.6% of residents that are high school graduates and 41.6% with a bachelor's degree or higher. The average temperature in Caledonia in the summer is 74 degrees, and in the winter 27 degrees.