A combined 1,000 acres were listed for sale in Putnam County recently; the combined value of all Putnam County farms, hunting land and other rural land and acreage for sale was around $700,000. Putnam County ranks 90th out of 102 counties in the Inland Empire for the total number of acres of land currently advertised for sale. Of all locations in Putnam County with farms, hunting land and other rural land and acreage for sale, Putnam had the most land for sale. Putnam County is Illinois's 102nd largest county (172 square miles). It's located in the Western Illinois region of Illinois.