Contra Costa County, California
Contra Costa County is a county in the state of California. It is in the United States. As of the 2010 census, the population was 1,049,025.[1] The county seat is Martinez.[2] It is in the northern part of the San Francisco Bay Area region.
References[change | change source]
- ↑ "State & County QuickFacts". United States Census Bureau. Archived from the original on February 22, 2016. Retrieved April 3, 2016.
- ↑ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved 2011-06-07.
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