Camp Eighteen 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 Butte County

Butte County, California

Butte County is a county located in the Central Valley of the US state of California, north of the state capital of Sacramento. As of the 2010 census, it had a population of 220,000. The county seat is Oroville. Butte County is the "Land of Natural Wealth and Beauty."Butte County is watered by the...

, 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...

, about 1.25 miles (2 km) from the Plumas County

Plumas County, California

Plumas County is a county located in the Sierra Nevada of the U.S. state of California. The county gets its name from the Spanish words for the Feather River , which flows through the county. As of the 2010 census, the population 20,007, down from 20,824 at the 2000 census...

 line. It lies 7 miles (11.3 km) north of Clipper Mills

Clipper Mills, California

Clipper Mills is a census-designated place in Butte County, California. It lies at an elevation of 3550 feet . The local newspaper is the Rabbit Creek Journal. Clipper Mills has a post office, first established in 1861 and moved in 1891. Its zip code is 95930...

, at an elevation of 3947 feet (1203 m). The ZIP Code is 95940. The community is inside area code 530

Area code 530

North American area code 530 is a California telephone area code that covers Auburn, Chico, Colfax, Davis, Grass Valley, Marysville, Oroville, Placerville, Redding, Red Bluff, Susanville, Truckee, Woodland, Yuba City and South Lake Tahoe....

. Nearby communities are Lumpkin

Lumpkin, California

Lumpkin is an unincorporated community in Butte County, California. It lies at an elevation of 3586 feet . It is located north-northwest of Clipper Mills on the Feather River Railway. A post office operated at Lumpkin from 1886 to 1919....

 and Rogerville

Rogerville, California

Rogerville is an unincorporated community in Butte County, California. It lies at an elevation of 3445 feet ....

. The now-defunct Feather River Railway used to serve the area but appears to have been decommissioned. Sly Creek Reservoir is about 3.6 miles (5.8 km) southeast.