A total of 100,000 acres were listed for sale in Douglas County, Oregon, recently; the value of all Douglas County land for sale was approximately $192 million. Douglas County ranks 10th in the Beaver State for the combined amount of land currently advertised for sale. Among cities in Douglas County with land and rural real estate for sale, Roseburg featured the most land for sale. Douglas County is one of the ten largest counties in Oregon (5,132 square miles). It's located in the Southern Oregon region of the state.