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The Commemorative
Quarter for
The Commemorative Quarter for California

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

The community of Stockton is the Seat for San Joaquin County.

San Joaquin County is one of the original counties of California and was founded in 1850.

From the Census Estimates for 2009, <1> San Joaquin had a population of 674,860 people. This is an increase of 19.74% since the last Census (which gave a population of 563,598 people in 2000).

At the time of the 2000 Census, San Joaquin represented 1.66% of the total population of California, making it the state's 15th 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
2010685,306+21.59%+1.55% since 2009
2009674,860+19.74%+0.91% since 2008
2008668,753+18.66%+0.53% since 2007
2000563,598The Last Census

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


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

Community 2009
(2009vs. 2000)
Stockton   287,578243,77117.97% increase  
Tracy   79,23556,92939.18% increase  
Manteca   65,63149,25833.24% increase  
Lodi   61,45056,9997.81% increase  
Lathrop   17,25610,44565.2% increase  

Websites for San Joaquin County

Official Website:   www.sjgov.org/

If you know of a history or genealogy society whose interest includes San Joaquin 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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About California

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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.

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

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