A total of almost 1,000 acres were listed for sale in Putnam County, Illinois, recently, representing a total value of around $700,000 in Putnam County farms, rural land, hunting land and other land for sale. Putnam County ranks 89th in the Prairie State for the combined amount of land currently advertised for sale. Of all locations in Putnam County with farms and rural land for sale, Putnam featured the most land for sale. Putnam County is the 102nd biggest county (172 square miles) in Illinois. It's located in the Western Illinois region of the state.