Washington County is in Western Maryland. Of the 24 counties in the Monumental State, 467-square-mile Washington County ranks 15th by size. The total value of about 1,000 acres of farms recently listed for sale in Washington County, Maryland, was almost $4 million. The average price of farmland for sale in Washington County was $899,937. 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.