De kalb is located in Buchanan county Missouri with a geographic area of 0.3 square miles. The total population in De kalb is 440 with 45.2% male and 54.8% female. Children under age 5 represent 10.7% of the population, under age 18 equal 37.7% of the population and over age 65 is 4.8% of the population. The median household income is $71,111, per capita income is $23,932. There are a total of 142 housing units with 72.5% owner occupied. Education includes 52.8% of residents that are high school graduates and 14.8% with a bachelor's degree or higher. The average temperature in De kalb in the summer is 77 degrees, and in the winter 32 degrees.