Carbon cliff is located in Rock island county Illinois with a geographic area of 2.1 square miles. The total population in Carbon cliff is 1,937 with 48.7% male and 51.3% female. Children under age 5 represent 5.3% of the population, under age 18 equal 20.7% of the population and over age 65 is 19.4% of the population. The median household income is $37,500, per capita income is $20,198. There are a total of 862 housing units with 44.5% owner occupied. Education includes 28.3% of residents that are high school graduates and 7.0% with a bachelor's degree or higher. The average temperature in Carbon cliff in the summer is 74 degrees, and in the winter 27 degrees.