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San Mateo County, California

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Seal of San Mateo County, California.svg

San Mateo County (/ˌsæn məˈt./ SAN mə-TAY-oh; Spanish for "Saint Matthew") is a county located in the U.S. state of California. As of the 2010 census, the population was 718,451.[1] The county seat is Redwood City.[2] The county is in the San Francisco Bay region.


  1. "State & County QuickFacts". United States Census Bureau. Retrieved April 6, 2016. 
  2. "Find a County". National Association of Counties. Retrieved 2011-06-07.