Land for sale in Greene County, Illinois, recently totaled approximately $12 million and almost 1,000 acres. Greene County ranks 63rd out of 102 counties in the Land of Lincoln for the combined amount of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Greene County, Carrollton featured 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 the state.