Yamhill County is located in the Willamette Valley region of Oregon and is included in the Portland Metro area. As of the 2010 census, the population was 99,193. The county is a significant focus of Oregon’s wine industry, having the largest area of any Oregon county planted in vineyards. Over 80 wineries and 200 vineyards represent the largest concentration of wine growers and producers in any county in the state. Cities in Yamhill County include Amity, Carlton, Dayton, Dundee, McMinnville, Newberg, and Yamhill.