The overall value of farms, ranches, hunting land and other land for sale in Oregon County, Missouri, recently on Land.com was almost $58 million. This represents almost 9,000 acres of farms and ranches for sale in Oregon County. Oregon County ranks 47th in the Gateway State for the combined amount of land currently advertised for sale. Of all locations in Oregon County with farms and ranches for sale, Alton had the most land for sale. Oregon County is Missouri's 14th largest county (791 square miles). It's located in the Southeast Missouri region of the state.