Eastport is a small 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 Contra Costa County

Contra Costa County, California

Contra Costa County is a primarily suburban county in the San Francisco Bay Area of the U.S. state of California. As of the 2010 census, it had a population of 1,049,025...

, 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...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is located 2.5 miles (4 km) south of Orinda

Orinda, California

-2010:The 2010 United States Census reported that Orinda had a population of 17,643. The population density was 1,389.5 people per square mile . The racial makeup of Orinda was 14,533 White, 149 African American, 22 Native American, 2,016 Asian, 24 Pacific Islander, 122 from other races, and...

, at an elevation of 830 feet (253 m). It lays along Pinehurst Road between Oakland

Oakland, California

Oakland is a major West Coast port city on San Francisco Bay in the U.S. state of California. It is the eighth-largest city in the state with a 2010 population of 390,724...

 and Canyon

Canyon, California

Canyon is an unincorporated community in Contra Costa County, California situated between Oakland and Moraga in the San Francisco Bay Area. The community is named for its location in the upper canyon of San Leandro Creek along the eastern slope of the Berkeley Hills...

, which is the closest settlement. The ZIP Code is 94516. The community is inside area code 510

Area code 510

North American area code 510 is a California telephone area code which covers most eastern Bay Area cities in Alameda County , and western Contra Costa County...

. Eastport is located at was the eastern portal of the Sacramento Northern Railroad Berkeley Hills Tunnel (abandoned 1957), hence the name.