Lithonia is located in Dekalb county Georgia with a geographic area of 0.9 square miles. The total population in Lithonia is 2,488 with 38.8% male and 61.2% female. Children under age 5 represent 9.1% of the population, under age 18 equal 37.5% of the population and over age 65 is 10.0% of the population. The median household income is $29,537, per capita income is $27,997. There are a total of 928 housing units with 23.8% owner occupied. Education includes 34.6% of residents that are high school graduates and 13.7% with a bachelor's degree or higher. The average temperature in Lithonia in the summer is 78 degrees, and in the winter 42 degrees.