Belvidere is located in Boone county Illinois with a geographic area of 12.1 square miles. The total population in Belvidere is 24,932 with 48.7% male and 51.3% female. Children under age 5 represent 5.8% of the population, under age 18 equal 24.2% of the population and over age 65 is 14.8% of the population. The median household income is $52,609, per capita income is $24,330. There are a total of 8,940 housing units with 73.2% owner occupied. Education includes 29.1% of residents that are high school graduates and 13.8% with a bachelor's degree or higher. The average temperature in Belvidere in the summer is 71 degrees, and in the winter 27 degrees.
