All Contra Costa County population data above are from the US Census Bureau.
With 1,135,127 people, Contra Costa County is the 9th most populated county in the state of California out of 58 counties. But watch out, Contra Costa County, because Fresno County with 979,915 people and Kern County with 884,788 people are right behind you.
|Contra Costa County||1,135,127|
The largest Contra Costa County racial/ethnic groups are White (46.0%) followed by Hispanic (24.9%) and Asian (15.1%).
|Top Race & Ethnicity Groups||%|
In 2015, the median household income of Contra Costa County residents was $80,185. Contra Costa County households made slightly more than Orange County households ($76,509) and Ventura County households ($77,348) . However, 10.9% of Contra Costa County residents live in poverty.
|Median Household Income|
|Contra Costa County||$80,185|
The median age for Contra Costa County residents is 38.8 years young.
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The District of Columbia Starter Report, shown on the left, will give you a good idea of what to expect in a Starter Report. The Contra Costa County, CA report will have the same data, charts & graphs as this sample.
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