A combined around 1,000 acres were listed for sale in Boone County, Illinois, recently; the overall value of all Boone County land and rural real estate for sale was around $45 million. Boone County ranks 18th out of 102 counties in the Inland Empire for the combined amount of land currently advertised for sale. Of all locations in Boone County with farms, rural land, hunting land and other land for sale, Belvidere featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Boone County. Boone County is Illinois's 94th biggest county (282 square miles). It's located in the Northern Illinois region of the state.