Walnut hill is located in Marion county Illinois with a geographic area of 0.4 square miles. The total population in Walnut hill is 112 with 47.3% male and 52.7% female. Children under age 5 represent 3.6% of the population, under age 18 equal 33.9% of the population and over age 65 is 14.3% of the population. The median household income is $32,917, per capita income is $20,692. There are a total of 41 housing units with 73.2% owner occupied. Education includes 43.9% of residents that are high school graduates and 14.6% with a bachelor's degree or higher. The average temperature in Walnut hill in the summer is 74 degrees, and in the winter 27 degrees.
