Jefferson County is in Great Plains Country Oklahoma. Of the 77 counties in the Sooner State, Jefferson County is 45th in terms of its size (774 square miles). There is 1,000 acres of residential land for sale in Jefferson County, Oklahoma, based on recent Land Network data. The combined market value of land and rural real estate for sale here is almost $800,000. The average price of residential land for sale in Jefferson County was $387,500. The county has a rural, farm-based economy. Browse all residential land and rural property for sale in Oklahoma to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.