Bull valley is located in Mchenry county Illinois with a geographic area of 9.1 square miles. The total population in Bull valley is 1,401 with 45.7% male and 54.3% female. Children under age 5 represent 5.0% of the population, under age 18 equal 11.6% of the population and over age 65 is 31.3% of the population. The median household income is $95,556, per capita income is $51,748. There are a total of 536 housing units with 93.8% owner occupied. Education includes 15.5% of residents that are high school graduates and 63.8% with a bachelor's degree or higher. The average temperature in Bull valley in the summer is 74 degrees, and in the winter 27 degrees.