Yorkville is an unincorporated community

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 in Mendocino County

Mendocino County, California

Mendocino County is a county located on the north coast of the U.S. state of California, north of the greater San Francisco Bay Area and west of the Central Valley. As of the 2010 census, the population was 87,841, up from 86,265 at the 2000 census...

, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. It is located 7.5 miles (12 km) southwest of Hopland

Hopland, California

Hopland is a census-designated place in Mendocino County, California. It is located on the west bank of the Russian River south-southeast of Ukiah, at an elevation of 502 feet . The population was 756 at the 2010 census....

, at an elevation of 922 feet (281 m).

The original townsite was about 3 miles (5 km) northwest of the present site at 38°54′50"N 123°15′40"W. The Yorkville post office opened in 1868 and moved to the new site with the town in 1937. The name honors R.H. York, the town's founder.

The Yorkville Highlands AVA

Yorkville Highlands AVA

The Yorkville Highlands AVA is an American Viticultural Area located in southern Mendocino County, California. The Yorkville Highlands separate Sonoma County's Alexander Valley AVA from Mendocino County's Anderson Valley AVA. The soil in the Yorkville Highlands is rocky with a high gravel...

was established in 1998.