Washington County is in Portland Metro Oregon. Of the 36 counties in the state, Washington County ranks 31st in terms of size (726 square miles). Washington County, Oregon, has approximately 3,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here was almost $16 million. The average price of farms for sale in Washington County was $1 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.