Washington County is in Portland Metro Oregon. Of the 36 counties in the Beaver State, 726-square-mile Washington County ranks 31st by size. A recent survey of Land Network data includes roughly 1,000 acres of farms for sale in Oregon's Washington County, which is valued at a combined $16 million. The average price of farmland for sale in Washington County was $2 million. Farms for sale in Washington County sustain livestock including cattle, horses, sheep, goats and pig. Browse all Oregon 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 business or individual needs.