South barrington is located in Lake county Illinois with a geographic area of 7.4 square miles. The total population in South barrington is 4,963 with 49.7% male and 50.3% female. Children under age 5 represent 3.1% of the population, under age 18 equal 28.7% of the population and over age 65 is 18.8% of the population. The median household income is $183,750, per capita income is $71,005. There are a total of 1,534 housing units with 100.0% owner occupied. Education includes 2.9% of residents that are high school graduates and 77.3% with a bachelor's degree or higher. The average temperature in South barrington in the summer is 74 degrees, and in the winter 27 degrees.