There was a total of around $94 million of farms, rural land, hunting land and other land for sale in Champaign County recently on Land.com. The total acreage of all Champaign County farms and rural real estate for sale was approximately 100,000 acres. Based on the combined acreage of land and rural property for sale here, Champaign County has the most land for sale of the 102 counties in the Land of Lincoln. Urbana had the most land for sale. From an economic perspective, government and state-level services contribute most to Champaign County's overall GDP. Champaign County is one of the ten largest counties in Illinois (998 square miles). It's located in the Central Illinois region of the state.