Atlas 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 Napa County

Napa County, California

Napa County is a county located north of the San Francisco Bay Area in the U.S. state of California. It is coterminous with the Napa, California, Metropolitan Statistical Area. As of 2010 the population is 136,484. The county seat is Napa....

, 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 lies at an elevation of 1719 feet (524 m). Atlas is located 8 miles (12.9 km) north-northwest of Mount Vaca

Mount Vaca

Mount Vaca is a mountain in Napa and Solano counties of Northern California. The summit is the highest point in Solano Countyand is one of several peaks in the San Francisco Bay Area that receive winter snow....

and 1.5 miles (2.4 km) south-southeast of Atlas Peak.

Atlas, named for nearby Atlas Peak, was founded as a resort community. The Atlas post office opened in 1893, moved in 1894, and closed in 1934.