The combined value of land and rural real estate for sale in Illinois's Boone County recently on Land.com was around $44 million. This represents approximately 1,000 acres of farms, hunting land and other rural land and acreage for sale in Boone County. Boone County ranks 18th out of 102 counties in the Inland Empire for the total acreage of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Boone County, Belvidere featured the most land for sale. Manufacturing and related services are the largest economic sectors in Boone County. Boone County is Illinois's 94th biggest county (282 square miles). It's located in the Northern Illinois region of Illinois.