The overall value of farms, hunting land and other rural land and acreage for sale in Illinois's Putnam County recently on Land.com was around $700,000. This represents approximately 1,000 acres of land and rural real estate for sale in Putnam County. Putnam County ranks 94th in the Land of Lincoln for the combined amount of land currently advertised for sale. Of all land for sale in Putnam County, Putnam featured the most land for sale. Putnam County is Illinois's 102nd biggest county (172 square miles). It's located in the Western Illinois region of the state.