Johnsburg is located in Mchenry county Illinois with a geographic area of 7.2 square miles. The total population in Johnsburg is 6,354 with 47.7% male and 52.3% female. Children under age 5 represent 5.1% of the population, under age 18 equal 26.3% of the population and over age 65 is 14.7% of the population. The median household income is $116,556, per capita income is $42,660. There are a total of 2,150 housing units with 91.4% owner occupied. Education includes 29.3% of residents that are high school graduates and 39.2% with a bachelor's degree or higher. The average temperature in Johnsburg in the summer is 74 degrees, and in the winter 27 degrees.
