About Alameda County, California

alameda county
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Alameda County is a county located in the U.S. state of California, and it is the 7th-most populous county in the state, with an estimated population of 1,751,185 as of the 2024 U.S. census data. The county seat is Oakland, and it is part of the San Francisco Bay Area, occupying much of the East Bay region. Alameda County was created on March 25, 1853, and the word “Alameda” is derived from the Spanish word for “a grove of poplars” or “a tree-lined street”.

The county is home to over 1.5 million people, living in 14 incorporated cities and six unincorporated communities. Some of the incorporated cities include Alameda, Albany, Berkeley, Dublin, Emeryville, Fremont, Hayward, Livermore, Newark, Oakland, Piedmont, Pleasanton, San Leandro, and Union City. The unincorporated communities are Ashland, Castlewood, Castro Valley, Cherryland, Fairview, Happy Valley, Hillcrest Knolls, San Lorenzo, and Sunol.

Alameda County is characterized by rich diversity and culture, with the 2010 Census showing that there is no majority racial or ethnic group in the county. The county’s government website, acgov.org, is a portal for all government information and functions, touching nearly all aspects of community life.