The overall value of land for sale in Greene County recently on Land.com was nearly $10 million. This represents around 1,000 acres of farms and rural real estate for sale in Greene County. Greene County ranks 70th out of 102 counties in Illinois for the total number of acres of land currently advertised for sale. Of all locations in Greene County with farms and rural land for sale, Roodhouse had the most land for sale. Its economy is defined as agricultural, with 689 farms recorded in the county during the most recent 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.