The total value of farms and rural land for sale in Illinois's Gallatin County recently on Land.com was nearly $9 million. This represents approximately 2,000 acres of farms, rural land, hunting land and other land for sale in Gallatin County. Gallatin County ranks 99th in Illinois for the combined amount of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Gallatin County, Equality had the most land for sale. Gallatin County is Illinois's 88th largest county (328 square miles). It's located in the Southern Illinois region of the state.