A total of approximately 100,000 acres were listed for sale in Gilliam County recently; the combined value of all Gilliam County ranches, farms, hunting land and other rural land and acreage for sale was nearly $20 million. Gilliam County ranks 35th in the Beaver State for the total number of acres of land currently advertised for sale. Of all locations in Gilliam County with ranches, farms, hunting land and other rural land and acreage for sale, Arlington had the most land for sale. Gilliam County is the 25th largest county (1,222 square miles) in Oregon. It's located in the Central Oregon region of Oregon.