Lake carroll is located in Carroll county Illinois with a geographic area of 13.5 square miles. The total population in Lake carroll is 500 with 45.6% male and 54.4% female. Children under age 5 represent 11.0% of the population, under age 18 equal 20.4% of the population and over age 65 is 55.0% of the population. The median household income is $84,048, per capita income is $38,274. There are a total of 216 housing units with 99.5% owner occupied. Education includes 20.4% of residents that are high school graduates and 34.3% with a bachelor's degree or higher. The average temperature in Lake carroll in the summer is 74 degrees, and in the winter 27 degrees.