Washington County is in Portland Metro Oregon. Of the 36 counties in the Union State, Washington County is 31st in terms of its size (726 square miles). Recent listings of farms for sale in Washington County, Oregon, totals roughly 1,000 acres and a combined market value of $19 million. The most common type of land for sale by combined acreage in Washington County is residential property. The average price of farms for sale in Washington County was $2 million. Farms for sale in Washington County support 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.