Black Point 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 Marin County

Marin County, California

Marin County is a county located in the North San Francisco Bay Area of the U.S. state of California, across the Golden Gate Bridge from San Francisco. As of 2010, the population was 252,409. The county seat is San Rafael and the largest employer is the county government. Marin County is well...

, 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 on the Petaluma River

Petaluma River

The Petaluma River is a river in the California counties of Sonoma and Marin that becomes a tidal slough near its mouth. It springs from farmlands southwest of Cotati and flows generally southward through Petaluma's old town and of tidal marshes to end in northwest San Pablo Bay.-History:The word...

 3.5 miles (5.6 km) east of downtown Novato

Novato, California

Novato is a city located in the North Bay region of the San Francisco Bay Area, in northern Marin County. Novato is located about north-northwest of San Rafael, at an elevation of 30 feet above sea level . The 2010 U.S. Census estimated the city population to be about 51,904. Novato is about ...

, 1 miles (1.6 km) west-northwest of Petaluma Point, at an elevation of 39 feet (12 m). For census purposes, Black Point is aggregated with other nearby communities in the census-designated place

Census-designated place

A census-designated place is a concentration of population identified by the United States Census Bureau for statistical purposes. CDPs are delineated for each decennial census as the statistical counterparts of incorporated places such as cities, towns and villages...

 Black Point-Green Point, California

Black Point-Green Point, California

Black Point-Green Point is a census-designated place in Marin County, California, United States. The population was 1,306 at the 2010 census.-Geography:...

.

The first Black Point post office operated from 1865 to 1891. The Grandview post office opened in 1905, changed its name to Black Point to 1944, and closed in 1952.