Washington County is in Western Maryland. Of the 24 counties in the Terrapin State, Washington County is 15th in terms of its size (467 square miles). There is roughly 1,000 acres of farms for sale in Washington County, Maryland, based on recent Land Network data. The combined market value of land for sale here is about $4 million. The average price of farmland for sale in Washington County was $912,250. Browse all Maryland farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future commercial or individual needs.