Buffalo grove is located in Lake county Illinois with a geographic area of 9.6 square miles. The total population in Buffalo grove is 40,804 with 47.3% male and 52.7% female. Children under age 5 represent 5.3% of the population, under age 18 equal 22.8% of the population and over age 65 is 14.0% of the population. The median household income is $117,921, per capita income is $53,787. There are a total of 15,276 housing units with 79.3% owner occupied. Education includes 9.9% of residents that are high school graduates and 67.7% with a bachelor's degree or higher. The average temperature in Buffalo grove in the summer is 74 degrees, and in the winter 27 degrees.
