There was a combined $25 million of farmsand rural real estate for sale in Illinois's Adams County recently on Land.com. The total of all Adams County land and rural real estate for sale was approximately 1,000 acres. Adams County ranks 39th in Illinois for the total number of acres of land currently advertised for sale. Of all locations in Adams County with farms, rural land, hunting land and other land for sale, Quincy had the most land for sale. Adams County is the 12th biggest county (871 square miles) in Illinois. It's located in the Western Illinois region of the state.