Alamo is an unincorporated community and census-designated place (CDP) in Contra Costa County, California, in the United States. It is a suburb located in the San Francisco Bay Area's East Bay region, approximately east of San Francisco. Alamo is equidistant between the city of Walnut Creek and the town of Danville. As of the 2010 census, the population was 14,750.
As an unincorporated community, Alamo does not have a government of its own. Police services are provided by the Contra Costa County Office of the Sheriff. Fire and EMS services are provided by the San Ramon Valley Fire Protection District.
Alamo, with a median household income of $140,561, is one of the wealthiest communities in the United States.
In August, 2007, a group of citizens launched a new initiative to incorporate the community, the latest in a series of attempts that go back to the early 1960s or before. Previous failed Alamo incorporation efforts always included parts of other nearby unincorporated areas: Alamo-Danville (1964) and Alamo-Danville-San Ramon (1976). This latest Alamo incorporation effort was defeated by referendum in March, 2009.