The value of all farms, rural land, hunting land and other land for sale in Gallatin County recently was $4 million, representing a total of 471 acres of land for sale in Gallatin County. Gallatin County ranks 88th in the Inland Empire for the total number of acres of land currently advertised for sale. Among cities in Gallatin County with farms, hunting land and other rural land and acreage for sale, Omaha featured 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 Illinois.