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The Commemorative
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The Commemorative Quarter for California

Time Zone: Alameda County lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time.

The community of Oakland is the Seat for Alameda County.

Alameda County was founded March 25, 1853. Alameda was created by taking area from Contra Costa and Counties.

From the Census Estimates for 2009, <1> Alameda had a population of 1,491,482 people. This is an increase of 3.31% since the last Census (which gave a population of 1,443,741 people in 2000).

At the time of the 2000 Census, Alameda represented 4.26% of the total population of California, making it the state's 7th most populous county (out of 58 counties).

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
20101,510,271+4.61%+1.26% since 2009
20091,491,482+3.31%+1.44% since 2008
20081,470,326+1.84%+1.47% since 2007
20001,443,741The Last Census

More information can be found on the Alameda County Census Page for Alameda County.


Below are some of the communities located in Alameda County (for more communities, please visit our Nearby Page for Alameda County):

Community 2009
(2009vs. 2000)
Oakland   409,189399,4842.43% increase  
Fremont   205,517203,4131.03% increase  
Hayward   144,291140,0303.04% increase  
Berkeley   102,804102,743  
Livermore   81,08573,34510.55% increase  

Websites for Alameda County

Official Website:   www.acgov.org/

If you know of a history or genealogy society whose interest includes Alameda County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.

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Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census. For more information, please visit the U.S. Census Bureau.

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<2>All Quarter-dollar coin images from the United States Mint.

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