Belvidere County Government Courts 601 N Main St Boone County Illinois is a well-planned mixture of recreation, commercial, industrial, agricultural and residential land uses with excellent accessibility to other large metropolitan areas. However, among the greatest assets are the people who call it home. The estimated County Population is over 40,000, and it is ideally located with access to I-90, I-39, and US Rt 20, making it very attractive to businesses and residents that live, work or play in the area. Chicago and Rockford are only short drives away. The Kishwaukee River, full of natural splendors and one of Illinois' highest water quality streams, runs through the heart of Belvidere, the County seat. Belvidere IL County Government Courts Boone County Circuit Judge www.boonecountyil.org Belvidere Illinois City Municipal Boone County Belvidere IL Murals Belvidere Illinois City Municipal Boone County Belvidere IL Murals Business Reviews Boone County Circuit Judge Testimonials