Washington County is in Delta Mississippi. Of the 82 counties in the state, Washington County is 13th in terms of its size (761 square miles). Mississippi's Washington County includes about 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of farmsand rural real estate for sale here was nearly $3 million. The average price of residential acreage for sale in Washington County was $228,909. Browse all residential land and rural property for sale in Mississippi 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.