Coal valley is located in Rock island county Illinois with a geographic area of 3.1 square miles. The total population in Coal valley is 3,817 with 56.5% male and 43.5% female. Children under age 5 represent 2.1% of the population, under age 18 equal 19.9% of the population and over age 65 is 22.2% of the population. The median household income is $73,472, per capita income is $41,944. There are a total of 1,643 housing units with 87.5% owner occupied. Education includes 20.7% of residents that are high school graduates and 36.6% with a bachelor's degree or higher. The average temperature in Coal valley in the summer is 74 degrees, and in the winter 27 degrees.
