The combined value of farms, hunting land and other rural land and acreage for sale in Greene County, Illinois, recently on Land.com was $11 million. This represents almost 1,000 acres of farms and rural land for sale in Greene County. Greene County ranks 63rd in the Prairie State for the total acreage of land currently advertised for sale. Carrollton had the most land for sale. Greene County has a large agricultural economy, with 689 farms recorded in the county during the latest U.S. Census. Farming activities in Greene County generate annual revenues of $12 million, most of which is from crops. Greene County is Illinois's 48th biggest county (546 square miles). It's located in the Western Illinois region of Illinois.