Yamhill 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. There was a total of $267 million of ranches, farms, hunting land and other rural land and acreage for sale in Yamhill County, Oregon, recently on Land.com. The total size of all Yamhill County farms, ranches, and rural real estate for sale was almost 5,000 acres. Yamhill County ranks 15th out of 36 counties in the state for the total acreage of land currently advertised for sale. Newberg featured the most land for sale. Yamhill County is the 32nd largest county (718 square miles) in Oregon. It's located in the Northwest Oregon region of the state.