Washington County is part of the the Chehalem Mountains AVA wine region, which sits on a series of sedimentary ridges that provide diverse soils and growing conditions at slightly higher altitudes than other Willamette Valley vineyards. Some 150 vineyards are located throughout the hilly countryside, comprising three counties?Yamhill, Washington and Clackamas?which frame the southwestern suburbs of the Portland metropolitan area. 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). The most common type of land for sale by combined acreage in Washington County is residential property. Browse all Washington County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg.