Alamo (Spanish: Álamo; meaning "Poplar tree") is an unincorporated community and census-designated place (CDP) in Contra Costa County, California, in the United States.

In August 2007, a group of citizens launched a new initiative to incorporate the community,[8] the latest in a series of attempts that go back to the early 1960s or before; it was defeated by referendum in March 2009.

[9] Previous failed Alamo incorporation efforts always included parts of other nearby unincorporated areas: Alamo-Danville (1964)[10] and Alamo-Danville-San Ramon (1976).

The Tatcan Indians, a Bay Miwok tribe closely connected to the Saclans of Walnut Creek, lived in Alamo in the eighteenth century.

The Mexican land grant Rancho San Ramon was deeded to Mariano Castro and his uncle Bartolo Pacheco in 1833.

In 1843 much of the Alamo, Las Trampas and Tice Valley areas were granted to brothers Inocencio and José Romero.

She wrote later: On every side, the valley and surrounding hills were covered with thick, velvety clover, and with wild oats standing waist high waving and rippling in the summer breeze, like the bosom of a lake.

John became the first postmaster in 1852 and she applied her considerable energies to schooling children and beginning a Cumberland Presbyterian church.

Other early Alamo founders included David Glass, George Engelmeyer, Silas and Susanna Stone, Captain Wall, Joshua Bollinger, and James Foster.

The Hemme, Bollinger, Jones and Stone ranches began by grazing cattle and raising wheat and other grains.

According to longtime postmaster Bertha Linhares, when the mail was expected the men sat in the post office-store in the winter … the women went into our sitting room and visited with my mother … We always heard all the news and troubles of the Alamo residents.

According to the United States Census Bureau, the CDP has a total area of 9.7 square miles (25 km2), all of it land.

Alamo experiences a warm-summer Mediterranean climate with hot, dry summers and cool, rainy winters.

Young was a World War II veteran, serving in the Pacific campaign where he assisted in the evacuation of the Chinese Fifth Army from North Vietnam.

During the summer months a series of concerts are held at the park in the early evenings typically over a weekend.

Located at 180 Hemme Avenue, this 5.4 acre park features soccer and softball fields, playground structures and restroom facilities.

[15] Located at 100 Wilson Road, this 2.2 acre community park offers soccer and baseball fields, batting cages, two multi-use sport courts and a picnic area.

The property was purchased in 1874 by Captain Isaac and Ann Trasker Swain on behalf of an orphanage in San Francisco.

The wilderness contains numerous plant and animal communities, including forested hillsides and riparian woods.

The Mount Diablo thrust fault runs through Alamo releasing small tremors about every other month.

Public education in the majority of Alamo is provided by the San Ramon Valley Unified School District.

The closest Bay Area Rapid Transit (BART) station is Walnut Creek on the Yellow Line.