Belvidere is a city in Boone County, Illinois, United States. The population was 25,585 as of the 2010 census. It is the county seat of Boone County. Belvidere is part of the Rockford, Illinois Metropolitan Statistical Area.GeographyBelvidere is located at, and sits at an altitude that is approximately 800ft above sea level. Located in north central Illinois, Belvidere is approximately 75mi northwest of the downtown of Chicago, and approximately 12mi east of Rockford. Belvidere is divided by the Kishwaukee River.According to the 2010 census, Belvidere has a total area of 12.312sqmi, of which 12.08sqmi is land and 0.232sqmi is water. Belvidere is located in north central Illinois and is 75 miles from downtown Chicago on Routes 20, 76 and the Northern Illinois Toll road, with the Kishwaukee River dividing the town. Belvidere is an industrial community surrounded by prosperous farms. It is the County Seat with an estimated 2006 county population of over 52,000. The altitude is 800 feet above sea level, average temperatures are: 73 degrees F in the summer; 24 degrees F in the winter, and the average rainfall is 33.3 inches.
