Brownstown is located in Fayette county Illinois with a geographic area of 0.8 square miles. The total population in Brownstown is 839 with 49.1% male and 50.9% female. Children under age 5 represent 9.9% of the population, under age 18 equal 24.2% of the population and over age 65 is 17.4% of the population. The median household income is $47,171, per capita income is $28,772. There are a total of 313 housing units with 67.1% owner occupied. Education includes 36.4% of residents that are high school graduates and 13.7% with a bachelor's degree or higher. The average temperature in Brownstown in the summer is 74 degrees, and in the winter 27 degrees.